Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows used in operating activities:
Net loss	$ (12,853)	$ (42,429)
Adjustments:
Depreciation of equipment	11	124
Gain on sale of equipment	(59)	0
Impairment of intangible assets	0	28,682
Impairment of goodwill	0	4,826
Impairment of assets held for sale	0	400
Stock-based compensation	913	1,811
Change in fair value of warrant liabilities	2,728	(10)
Deferred income tax benefit	(1,832)	(9,542)
Unrealized foreign exchange (gain) loss	0	5
Loss on disposal	39	39
Changes in operating assets and liabilities:
Receivables	80	(302)
Prepaid expenses	315	72
Trade and other payables	(1,652)	411
Operating lease right of use asset	(23)	0
Net cash used in operating activities	(12,333)	(15,913)
Cash flows from investing activities:
Purchase of equipment	(22)	(17)
Proceeds from sale of equipment	111	0
Purchase of short-term investments	(6,554)	(5,015)
Maturity of short-term investments	6,569	18,185
Net cash provided by investing activities	104	13,153
Cash flows from financing activities:
Net proceeds from issuance of common shares and warrants from private placement	7,338	0
Proceeds from issuance of common shares from exercise of stock options	21	0
Net proceeds from shares issued under the at-the-market (ATM) program	0	304
Net cash provided by financing activities	7,359	304
Effect of exchange rate fluctuations on cash and cash equivalents	0	(8)
Net decrease in cash and cash equivalents	(4,870)	(2,464)
Cash and cash equivalents, beginning of year	27,875	30,339
Cash and cash equivalents, end of year	23,005	27,875
Cash and Cash Equivalents [Abstract]
Cash	3,280	17,803
Cash equivalents	$ 19,725	$ 10,072