Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Mar. 31, 2017
Current Assets
Cash and cash equivalents	$ 47,338	$ 62,751
Accounts receivable	1,174	647
Grant receivable	260	0
Inventory, net	605	550
Prepaid expenses and other current assets	891	1,144
Total current assets	50,268	65,092
Fixed assets, net	2,978	3,840
Restricted cash	127	127
Other assets, net	181	121
Total assets	53,554	69,180
Current Liabilities
Accounts payable	452	1,171
Accrued expenses	2,808	4,101
Deferred revenue	857	582
Deferred rent	180	157
Total current liabilities	4,297	6,011
Deferred revenue, net of current portion	43	58
Deferred rent, net of current portion	613	749
Total liabilities	4,953	6,818
Commitments and Contingencies (Note 3)	0	0
Stockholders’ Equity
Common stock, $0.001 par value; 150,000,000 shares authorized, 109,322,626 and 104,551,466 shares issued and outstanding at December 31, 2017 and March 31, 2017, respectively	109	104
Additional paid-in capital	275,176	261,586
Accumulated deficit	(226,671)	(199,317)
Accumulated other comprehensive income (loss)	(13)	(11)
Total stockholders’ equity	48,601	62,362
Total Liabilities and Stockholders’ Equity	$ 53,554	$ 69,180