Unaudited Condensed Consolidated Statements of Operations and Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Revenues
Products and services	$ 832	$ 699	$ 2,722	$ 2,396
Collaborations and licenses	61	443	367	1,001
Grants	260	9	409	21
Total Revenues	1,153	1,151	3,498	3,418
Cost of revenues	192	212	747	773
Research and development expenses	4,005	5,024	13,982	14,012
Selling, general and administrative expenses	4,865	5,546	16,457	16,520
Total costs and expenses	9,062	10,782	31,186	31,305
Loss from Operations	(7,909)	(9,631)	(27,688)	(27,887)
Other Income (Expense)
Change in fair value of warrant liabilities	0	1	0	(4)
Interest income	118	50	334	124
Total Other Income (Expense)	118	51	334	120
Income Tax Expense	0	(1)	0	(23)
Net Loss	(7,791)	(9,581)	(27,354)	(27,790)
Currency Translation Adjustment	(2)	(3)	(2)	(10)
Comprehensive Loss	$ (7,793)	$ (9,584)	$ (27,356)	$ (27,800)
Net loss per common share—basic and diluted	$ (0.07)	$ (0.09)	$ (0.26)	$ (0.29)
Weighted average shares used in computing net loss per common share—basic and diluted	107,345,623	101,174,734	106,107,721	95,595,640