Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Current Assets
Cash and cash equivalents	$ 35,224	$ 43,726
Accounts receivable	547	883
Grant receivable	124	145
Inventory, net	1,049	842
Prepaid expenses and other current assets	527	1,164
Total current assets	37,471	46,760
Fixed assets, net	1,946	2,788
Restricted cash	127	127
Other assets, net	141	152
Total assets	39,685	49,827
Current Liabilities
Accounts payable	647	464
Accrued expenses	2,156	3,341
Deferred revenue	580	668
Deferred rent	27	185
Total current liabilities	3,410	4,658
Deferred revenue, net of current portion	0	19
Deferred rent, net of current portion	600	564
Total liabilities	4,010	5,241
Commitments and Contingencies	0	0
Stockholders’ Equity
Common stock, $0.001 par value; 200,000,000 shares authorized, 117,769,919 and 111,032,957 shares issued and outstanding at December 31, 2018 and March 31, 2018, respectively	118	111
Additional paid-in capital	289,329	278,595
Accumulated deficit	(253,772)	(234,120)
Total stockholders’ equity	35,675	44,586
Total Liabilities and Stockholders’ Equity	$ 39,685	$ 49,827