Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (5,236)	$ (13,722)
Adjustments to reconcile net loss to net cash used in operating activities:
Inventory write-off	202	266
Depreciation and amortization	621	599
Provision for doubtful accounts	0	110
Licensing revenue from a related party	(8,000)	(5,000)
Stock-based compensation	1,856	1,393
Interest cost	295	571
Gain on promissory note conversion	(1,222)	0
Loss in joint venture	1,839	5,417
Changes in fair value of promissory note	(605)	1,394
Changes in operating assets and liabilities:
Accounts receivable	(871)	423
Inventory	(3,935)	(808)
Prepaid expenses and other current assets	204	320
Other assets	(8)	197
Accounts payable and accrued expenses	1,359	63
Deferred revenue	(238)	674
Accrued payroll and benefits	(171)	139
Net cash used in operating activities	(13,910)	(7,964)
Cash flows from investing activities:
Purchases of property and equipment	(690)	(58)
Investment in joint venture	(3,765)	(5,800)
Net cash used in investing activities	(4,455)	(5,858)
Cash flows from financing activities:
Proceeds from stock option exercise	134	14
Proceeds from issuance of common stock, net	49,773	13,646
Net cash provided by financing activities	49,907	13,660
Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash	(75)	208
Net increase in cash, cash equivalents and restricted cash	31,467	46
Cash, cash equivalents and restricted cash at beginning of period	9,500	14,648
Cash, cash equivalents and restricted cash at end of period	40,967	14,694
Supplemental disclosures of cash flow information:
Interest expense paid	316	915
Supplemental non-cash investing activity:
Equipment purchases	250	0
Supplemental non-cash financing activity:
Issuance of shares in connection with a service contract	500	0
Development loan reduction related to licensing revenue	8,000	5,000
Conversion of promissory note	$ 15,600	$ 0