Supplementary Statement of Cash Flows Information - Schedule of Supplementary Statement of Cash Flows Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Deemed dividend recognized on beneficial conversion features of Series C Preferred stock issuance (note 6)			$ 3,181
Non-cash issue costs (note 6)		$ 333	3,287
Preferred Stock Series C
Supplemental Cash Flow Elements [Abstract]
Preferred Stock common stock dividend (note 7)		$ 2,462
Deemed dividend recognized on beneficial conversion features of Series C Preferred stock issuance (note 6)			3,181
Series B Preferred Stock
Supplemental Cash Flow Elements [Abstract]
Preferred Stock common stock dividend (note 7)	$ 6		15
Series C Warrants
Supplemental Cash Flow Elements [Abstract]
Cashless exercise of Series C warrants (note 6)			$ 71