Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

Stockholders' Equity - Additional Information (Detail)		1 Months Ended	3 Months Ended				6 Months Ended		9 Months Ended		12 Months Ended
Stockholders' Equity - Additional Information (Detail)	Aug. 16, 2019 USD ($) $ / shares shares	Sep. 30, 2014 $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2020 shares	Dec. 31, 2019 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Aug. 19, 2021 shares	Jun. 26, 2021 shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2016 $ / shares shares	Aug. 14, 2020 shares
Class Of Stock [Line Items]
Deemed dividend recognized on beneficial conversion features of Series C Preferred stock issuance \| $							$ 3,181,000
Preferred stock, par value \| $ / shares			$ 0.001				$ 0.001				$ 0.001
Underwritten public offering, description							the Company closed on the sale of (i) 4,895,000 shares of its common stock, par value $0.001 per share (the “Common Stock”), (ii) pre-funded warrants (“PFW”) to purchase an aggregate of 2,655,000 shares of Common Stock and (iii) common warrants to purchase an aggregate of 7,762,500 shares of Common Stock (“2020 Investor Warrants”), including 800,000 shares of Common Stock and 2020 Investor Warrants to purchase an aggregate of 1,012,500 shares of Common Stock sold pursuant to a partial exercise by the underwriters of the underwriters’ option to purchase additional securities, in the Company’s underwritten public offering (the “Offering”). Each share of Common Stock or PFW, as applicable, was sold together with a 2020 Investor Warrant to purchase one share of Common Stock at a combined effective price to the public of $1.00 per share of Common Stock and accompanying 2020 Investor Warrant.
Common stock, shares issued			25,868,000				25,868,000				11,458,000
Warrants exercised for cash \| $							$ 1,180,000	$ 27,000
Shares issued for services \| $					$ 3,000	$ 5,000
Accumulated stock option exercises							35,000
Number of options granted							4,999,000
Total compensation expense \| $			$ 2,125,000		160,000		$ 2,530,000	211,000
Stock options exercisable			1,221				1,221
Accelerated vested of stock option							279,675
Accelerated expense \| $							$ 53,455,000
Stock option exercise price \| $ / shares			$ 0.61				$ 0.61
Number of stock options outstanding			6,487				6,487
Stock options [Member]
Class Of Stock [Line Items]
Aggregate intrinsic value of stock options outstanding \| $			$ 789,343		39,198		$ 789,343	39,198
Aggregate intrinsic value of stock options exercisable \| $			571,657		$ 7,472		571,657	7,472
Unrecognized compensation expense \| $			$ 5,700				$ 5,700
Unrecognized compensation expense, term							2 years 9 months
Aggregate intrinsic value of unvested stock options \| $							$ 217,686	$ 31,726
Weighted average contractual term							9 years 7 months 20 days	9 years 6 months 7 days
2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Number of shares available under the plan													6,700,000
Common stock, shares outstanding			142,375				142,375
Common stock, shares issued \| $							$ 6,344,334,000
Common stock issued under the 2017 Plan							178,291
Percentage of fully diluted shares of common stock							8.00%
Number of options granted							222,584		155,734	66,850
Previous grants during the period							250,000
Stock options [Member]
Class Of Stock [Line Items]
Accumulated stock option exercises							35
Number of options granted							4,999,000
Stock option exercise price \| $ / shares							$ 0.61
Number of options forfeited							14,000
Number of stock options outstanding			6,487,000				6,487,000				1,559,000
Stock options [Member] \| CA$ $20.00 Exercise Price
Class Of Stock [Line Items]
Stock option exercise price \| $ / shares			$ 15.70				$ 15.70
Number of stock options outstanding			2,500				2,500
Common stock
Class Of Stock [Line Items]
Series B preferred stock dividend, shares			3,000	4,000	4,000	4,000
Conversion of Series B preferred stock to common stock, shares			10,000			6,000
Issued warrants to underwriters	4,895,000
Warrants exercise price \| $ / shares	$ 0.001
Shares issued for services, shares					5,000	7,000	0	11,672
Shares issued for services \| $							$ 0	$ 8,187
Pre-Funded Warrants
Class Of Stock [Line Items]
Issued warrants to underwriters	2,655,000
Warrants exercise price \| $ / shares					$ 0.01			$ 0.01
Issued warrants to underwriters					2,655,000			2,655,000
Warrants exercised for cash \| $								$ 26,550,000
2020 Investor Warrant [Member]
Class Of Stock [Line Items]
Issued warrants to underwriters	7,762,500
Common stock, shares issued	800,000
Warrants To Purchase Common Stock1	1,012,500
Underwriting discounts and commissions amount \| $	$ 6,582,966,000
Expiry date	Aug. 16, 2024
Placement Agent \| Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Fair value disclosure \| $			$ 3,300,000				$ 3,300,000
Warrants outstanding, term			4 years				4 years
Director \| 2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Total compensation expense \| $							$ 319,376,000
Subject to Stockholder Approval \| 2017 Omnibus Incentive Plan [Member] \| Group Two
Class Of Stock [Line Items]
Stock options exercisable			250,000				250,000
Executive Officers and Directors \| 2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Number of options granted							4,758,687,000
Number of options expected to vest			4,278,687,000				4,278,687,000
Stock option vesting description							Of the total granted, 4,278,687 stock options vest as to 1/6 on the six-month anniversary of the grant date with the remaining portion vesting in equal monthly installments over a period of 30 months commencing on the seven-month anniversary of the grant date. Of the total stock options granted to executive officers and directors, 480,000 vest in 12 equal monthly installments beginning on October 15, 2020. All of the stock options granted have a 10-year term and are subject to cancellation upon the grantees’ termination of service for the Company, with certain exceptions
Stock option term							10 years
Executive Officers and Directors \| 2017 Omnibus Incentive Plan [Member] \| Exercise Price of 1.70
Class Of Stock [Line Items]
Number of options granted							4,698,687,000
Stock option exercise price \| $ / shares							$ 1.70
Executive Officers and Directors \| 2017 Omnibus Incentive Plan [Member] \| Exercise Price of 1.355
Class Of Stock [Line Items]
Stock option exercise price \| $ / shares							$ 1.355
Number of options forfeited							60,000,000
Minimum \| Director \| 2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Exercise period							90 days
Maximum \| Director \| 2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Exercise period							1 year
Measurement Input, Risk Free Interest Rate \| Placement Agent \| Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Warrants outstanding, measurement input			0.27				0.27
Measurement Input, Price Volatility \| Minimum \| Placement Agent \| Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Warrants outstanding, measurement input			95.2				95.2
Measurement Input, Price Volatility \| Maximum \| Placement Agent \| Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Warrants outstanding, measurement input			95.8				95.8
Preferred Stock Series C
Class Of Stock [Line Items]
Shares issued of common stock for services							25,028
Issuance, shares							25,028
Conversion of common stock, shares issued							21,516,484
Deemed dividend recognized on beneficial conversion features of Series C Preferred stock issuance \| $							$ 3,180,000
Liquidation value \| $			$ 23,670,000				$ 23,670,000
Deferred financing costs \| $											$ 84,944
Preferred stock, shares outstanding			23,670				23,670				0
Conversion of Series C preferred stock to common stock shares			20,348,764				20,348,764				0
Preferred Stock, shares issued			24,000				24,000				0
Preferred Stock Series C \| Placement Agent \| Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Conversion of common stock, shares issued							2,152,701
Shares issued of common stock for services							2,504
Series C-1 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price \| $ / shares			$ 1.16				$ 1.16
Series C-2 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price \| $ / shares			1.214				1.214
Series C-3 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price \| $ / shares			$ 1.15				$ 1.15
Preferred Stock Series B
Class Of Stock [Line Items]
Conversion price \| $ / shares												$ 32.00
Liquidation value \| $			$ 4,900,000				$ 4,900,000				$ 5,200,000
Shares issued of common stock for services												902,238
Preferred stock, shares outstanding			610,238				610,238				648,613
Conversion of Series C preferred stock to common stock shares												0.25
Purchase price of shares \| $ / shares												$ 8.00
Bid price \| $ / shares												$ 80.00
Final closing date												5 years
Conversion of preferred stock to common stock date												Apr. 29, 2021
Preferred stock, rate of dividend												9.00%
Direct increase in accumulated deficit \| $			$ 4,453		$ 2,552		$ 9,633	$ 4,598
Conversion of Series B preferred stock to common stock, shares							152,580				162,177
Preferred Stock, shares issued			610,000				610,000				649,000
Common stock
Class Of Stock [Line Items]
Series B preferred stock dividend, shares			3,479		3,700		7,179	7,400
Preferred Stock Series A
Class Of Stock [Line Items]
Liquidation value \| $			$ 278,530				$ 278,530				$ 278,530
Preferred stock, shares outstanding			279,000				279,000				279,000
Preferred stock, rate of dividend		3.00%
Preferred Stock, shares issued			279,000				279,000				279,000
Change in preferred stock \| $			$ 0		$ 0		$ 0	$ 0
Preferred Stock Series A \| Exchange Agreement [Member]
Class Of Stock [Line Items]
Preferred stock, rate of dividend		3.00%
Preferred Stock, shares issued		278,530
Preferred stock, par value \| $ / shares		$ 1.00
Private Placement [Member] \| Preferred Stock Series C
Class Of Stock [Line Items]
Shares issued of common stock for services							25,028
Issuance, shares							25,028
Cumulative dividends \| $			$ 15,061,952				$ 15,061,952
Total gross proceeds \| $							25,000,000
Net proceeds from private placement \| $							21,600,000
Deferred financing costs \| $							$ 3,400,000
Private Placement [Member] \| Series C Preferred Stock Warrants
Class Of Stock [Line Items]
Shares issued of common stock for services							2,504
Shares issued, price per share \| $ / shares			$ 1,000				$ 1,000
Issuance, shares							2,504
Underwriting Offering \| 2020 Investor Warrant [Member]
Class Of Stock [Line Items]
Warrants exercise price \| $ / shares	$ 1.15
Expiry date	Aug. 14, 2022
Issued warrants to underwriters	377,500,000
Underwriter warrants commencing date	Feb. 10, 2020
Merger Agreement [Member]
Class Of Stock [Line Items]
Dividend rate							0.00%
Merger Agreement [Member] \| Private Placement [Member] \| Preferred Stock Series C
Class Of Stock [Line Items]
Shares issued of common stock for services							25,028
Shares issued, price per share \| $ / shares			$ 1,000				$ 1,000
Issuance, shares							25,028
Merger Agreement [Member] \| Private Placement [Member] \| Preferred Stock Series C \| First Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate							10.00%
Merger Agreement [Member] \| Private Placement [Member] \| Preferred Stock Series C \| Second Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate							15.00%
Merger Agreement [Member] \| Private Placement [Member] \| Preferred Stock Series C \| Third Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate							20.00%
Merger Agreement [Member] \| Private Placement [Member] \| Preferred Stock Series C \| Fourth Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate							25.00%