Consolidated Statements of Operations and Other Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenues
Products and services	$ 3,167	$ 806	$ 314
Collaborations	1,022	486	134
Grants	41	191	123
Total Revenues	4,230	1,483	571
Cost of revenues	956	0	0
Research and development expenses	19,545	18,008	12,921
Selling, general, and administrative expense	22,304	22,118	17,947
Total costs and expenses	42,805	40,126	30,868
Loss from Operations	(38,575)	(38,643)	(30,297)
Other Income (Expense)
Change in fair value of warrant liabilities	4	(17)	196
Loss on disposal of fixed assets	(51)	0	(12)
Interest expense	0	0	(1)
Interest income	198	88	32
Total Other Income (Expense)	151	71	215
Income Tax Expense	(23)	(3)	0
Net Loss	$ (38,447)	$ (38,575)	$ (30,082)
Net loss per common share—basic and diluted	$ (0.39)	$ (0.43)	$ (0.38)
Weighted average shares used in computing net loss per common share—basic and diluted	97,763,032	90,057,356	79,650,087
Comprehensive Loss:
Net Loss	$ (38,447)	$ (38,575)	$ (30,082)
Currency Translation Adjustment	(11)	0	0
Comprehensive Loss	$ (38,458)	$ (38,575)	$ (30,082)