Stockholders' Equity (Tables)
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6 Months Ended |
Dec. 31, 2022 |
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| Class Of Stock [Line Items] |
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| Schedule of Stock Option Expense |
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Three months ended
December 31, |
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Six months ended
December 31, |
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2022
$ |
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2021
$ |
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2022
$ |
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2021
$ |
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Research and development |
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134 |
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249 |
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274 |
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493 |
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General and administrative |
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302 |
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581 |
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680 |
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1,148 |
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436 |
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830 |
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954 |
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1,641 |
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| Schedule of Unvested Stock Options |
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Number of
Options
(in thousands) |
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Weighted
average
exercise
price
$ |
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Unvested at June 30, 2022 |
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84 |
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51.23 |
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Granted |
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70 |
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9.13 |
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Vested |
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(27 |
) |
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49.08 |
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Unvested at December 31, 2022 |
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127 |
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28.37 |
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| Schedule of Warrants |
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Number of
Warrants
(in thousands) |
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Weighted
average
exercise
price
$ |
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Balance – June 30, 2022 |
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720 |
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49.36 |
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Expiry of 2018 Investor and Agent warrants |
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(6 |
) |
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625.00 |
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Balance – December 31, 2022 |
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714 |
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44.20 |
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| Schedule of Changes in Outstanding Warrants |
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Description of warrants |
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Number
(in thousands) |
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Exercise
price $ |
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Expiry date |
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2022 April Investor warrants |
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325 |
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20.50 |
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April 14, 2027 |
2022 Investor warrants |
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240 |
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62.50 |
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March 28, 2025 |
2020 Investor warrants |
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65 |
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50.00 |
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August 16, 2024 |
2019 Investor warrants |
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15 |
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155.00 |
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June 5, 2024 |
NBTS Warrants |
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2 |
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54.50 |
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June 19, 2025 |
Warrants issued for services |
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22 |
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32.00 to 890.00 |
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January 25, 2023, to February 25, 2024 |
2022 April Agent warrants |
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32 |
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33.12 |
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October 14, 2026 |
2022 Agent warrants |
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12 |
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78.12 |
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March 28, 2025 |
2019 Agent warrants |
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1 |
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193.75 |
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June 3, 2024 |
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714 |
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| Series C Warrants [Member] |
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| Class Of Stock [Line Items] |
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| Schedule of Changes in Outstanding Warrants |
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Series C Agent Warrants |
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Number |
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Conversion
price
$ |
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Number of
conversion
shares
(in
thousands) |
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Cumulative
common
stock
dividends
(in
thousands) |
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Series 1 |
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1,929 |
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58.00 |
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33 |
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23 |
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Series 2 |
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219 |
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60.70 |
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4 |
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3 |
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Series 3 |
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296 |
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57.50 |
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5 |
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4 |
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2,444 |
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42 |
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30 |
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| Schedule of Conversion of Series C Preferred Stock to Series C Warrants |
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Balance
June 30, 2022 |
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Number of
Warrants Issued |
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Number of
Warrants Exercised |
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Balance,
December 31, 2022 |
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Conversion
price
$ |
|
Preferred Series C-1 Agent Warrants |
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1,929 |
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— |
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— |
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1,929 |
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58.00 |
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Preferred Series C-2 Agent Warrants |
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219 |
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— |
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— |
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219 |
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60.70 |
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Preferred Series C-3 Agent Warrants |
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296 |
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— |
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— |
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296 |
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57.50 |
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2,444 |
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— |
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— |
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2,444 |
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| Stock options [Member] |
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| Class Of Stock [Line Items] |
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| Schedule of Outstanding Under the Legacy Plan |
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Number of
stock options
outstanding
(in thousands) |
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Weighted
average
exercise
price |
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Balance – June 30, 2022 |
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176 |
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87.05 |
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Granted |
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70 |
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9.13 |
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Expired |
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(5 |
) |
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85.00 |
|
Balance – December 31, 2022 |
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|
241 |
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|
64.54 |
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| Summary of Stock Options Currently Outstanding and Exercisable |
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Exercise price
$ |
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Number
Outstanding at
December 31, 2022
(in thousands) |
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Weighted
average remaining
contractual life
(years) |
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Number
exercisable at
December 31, 2022
(in thousands) |
8.79 |
|
64 |
|
9.84 |
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— |
12.75 to 16.25 |
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6 |
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10.08 |
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2 |
30.50 to 48.00 |
|
92 |
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7.94 |
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39 |
62.00 to 68.50 |
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14 |
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8.64 |
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12 |
85.00 |
|
60 |
|
2.80 |
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57 |
304.95 to 585.00 |
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3 |
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1.20 |
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3 |
1,055.00 to 4,600.00 |
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2 |
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1.79 |
|
1 |
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|
241 |
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114 |
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| Schedule of Valuation Assumptions Using a Black-Scholes Pricing Model |
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December 31, 2022 |
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Dividend rate |
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— |
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% |
Estimated volatility |
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91.40 |
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% |
Risk-free interest rate |
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2.67 |
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% |
Expected term – years |
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6.08 |
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| Performance stock units [Member] |
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| Class Of Stock [Line Items] |
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| Schedule of Issuance of Series C Preferred Stock |
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Series C Preferred Stock |
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Number
of shares |
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$
(in thousands) |
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Balance – June 30, 2022 |
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|
16,838 |
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12,275 |
|
Conversion of Series C Preferred stock to common stock |
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(2,450 |
) |
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(1,778 |
) |
Balance – December 31, 2022 |
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|
14,388 |
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|
10,497 |
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| Schedule of Series C Preferred Stock Outstanding, Conversion Shares and Aggregate Dividends |
The Company’s Series C Preferred Stock outstanding, conversion shares, and aggregate dividends as of December 31, 2022, are as follows:
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Series |
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Number |
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Conversion
price
$ |
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|
Number of
conversion
shares
(in
thousands) |
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|
Dividend Shares (in thousands) |
|
Series 1 |
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|
11,545 |
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|
58.00 |
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|
199 |
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|
154 |
|
Series 2 |
|
|
898 |
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|
60.70 |
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|
15 |
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|
10 |
|
Series 3 |
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|
1,945 |
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|
57.50 |
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|
34 |
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|
25 |
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14,388 |
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|
248 |
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|
189 |
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Series C Dividends |
|
Dividend Shares
(in thousands) |
|
10% - August 19, 2021 (actual) |
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|
34 |
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15% - August 19, 2022 (actual) |
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|
43 |
|
20% - August 19, 2023 (estimated) |
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|
50 |
|
25% - August 19, 2024 (estimated) |
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|
62 |
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|
189 |
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