Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 37,477	$ 26,784
Accounts receivable, net	7,752	7,956
Inventory	15,639	17,462
Prepaid expenses and other current assets	3,303	2,703
Restricted cash	100	795
Total current assets	64,271	55,700
Property, plant and equipment, net	39,282	43,438
Intangibles, net	192	301
Restricted cash	165	165
Deferred tax assets	426	407
Other assets	267	233
Total assets	104,603	100,244
Current liabilities:
Accounts payable and accrued expenses	14,020	14,490
Note payable, current portion, net of discount of $19 as of March 31, 2017	0	1,481
Derivative liabilities	998	1,923
Deferred revenue	17,685	14,323
Total current liabilities	32,703	32,217
Deferred revenue	8,249	7,631
Deferred tax liabilities	125	125
Other liabilities	209	45
Total liabilities	41,286	40,018
Commitments and contingencies (Note 13)
Stockholders' equity:
Common stock	193	147
Additional paid-in capital	1,035,261	1,017,510
Treasury stock	(1,645)	(1,371)
Accumulated other comprehensive income (loss)	317	(503)
Accumulated deficit	(970,809)	(955,557)
Total stockholders' equity	63,317	60,226
Total liabilities and stockholders' equity	$ 104,603	$ 100,244