Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue, net, including related parties (Note 11)	$ 3,216	$ 6,329
Operating expenses:
Cost of goods sold	2,567	1,248
Research and development	1,823	1,594
Sales and marketing	687	528
General and administrative	2,743	2,058
Total operating expenses	7,820	5,428
Loss from operations	(4,604)	901
Interest expense	204	189
Loss in joint venture	1,490	1,856
Changes in fair value of promissory note	1,024	1,658
Other income, net	(270)	(532)
Loss before tax expense	(7,052)	(2,270)
Tax expense	0	0
Net loss	$ (7,052)	$ (2,270)
Net loss per share - basic (in usd per share)	$ (0.17)	$ (0.06)
Net loss per share - diluted (in usd per share)	$ (0.17)	$ (0.06)
Weighted average common shares outstanding - basic (in shares)	40,637,213	35,135,520
Weighted average common shares outstanding - diluted (in shares)	40,637,213	35,135,520