Supplementary Statement of Cash Flows Information - Schedule of Supplementary Statement of Cash Flows Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Supplemental Cash Flow Information [Abstract]
Preferred Stock common stock dividend (note 6)	$ 173	$ 362
Series A Preferred Stock cash dividend in accounts payable	8	8
Non-cash issue costs (note 6)		289
Equipment additions reclassified from prepaid expenses		447
Conversion of Series C Preferred Stock to common stock (note 6)	393
Preferred Stock Series C
Supplemental Cash Flow Information [Abstract]
Preferred Stock common stock dividend (note 6)	173	362
Conversion of Series C Preferred Stock to common stock (note 6)	(393)	$ (1,909)
Preferred Stock Series A
Supplemental Cash Flow Information [Abstract]
Series A Preferred Stock cash dividend in accounts payable	$ 2