Consolidated Statements of Operations and Other Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Total Revenues	$ 3,091	$ 4,603
Cost of revenues	482	1,030
Research and development expenses	14,752	17,956
Selling, general, and administrative expense	15,131	20,888
Total costs and expenses	30,365	39,874
Loss from Operations	(27,274)	(35,271)
Other Income (Expense)
Gain (loss) on fixed asset disposals	(63)	4
Interest income	705	478
Other income (expense)	0	(12)
Total Other Income (Expense)	642	470
Income Tax Expense	(3)	(2)
Net Loss	$ (26,635)	$ (34,803)
Net loss per common share—basic and diluted	$ (0.23)	$ (0.32)
Weighted average shares used in computing net loss per common share—basic and diluted	115,379,902	107,243,974
Comprehensive Loss:
Net Loss	$ (26,635)	$ (34,803)
Currency Translation Adjustment	0	11
Comprehensive Loss	(26,635)	(34,792)
Products and Services [Member]
Revenues
Total Revenues	2,333	3,627
Collaborations and Licenses [Member]
Revenues
Total Revenues	171	422
Grants [Member]
Revenues
Total Revenues	$ 587	$ 554