Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 41,246	$ 24,699
Marketable securities	10,191	30,149
Accounts receivable, net	16,810	16,987
Inventory	14,155	18,975
Prepaid expenses and other current assets	3,496	2,959
Restricted cash	508	508
Total current assets	86,406	94,277
Marketable securities		5,046
Property, plant and equipment, net	8,140	8,565
Intangibles, net	3,309	3,550
Right-of-use assets	3,907	3,359
Goodwill	1,719	1,719
Restricted cash	5,782	5,657
Deferred tax assets	1,631	1,551
Other assets	333	385
Total assets	111,227	124,109
Current liabilities:
Accounts payable and accrued expenses	18,470	22,091
Lease liability, current portion	568	439
Deferred revenue, current portion	13,547	18,430
Total current liabilities	32,585	40,960
Deferred revenue, long term portion	8,409	7,712
Lease liability, long term portion	3,430	3,000
Deferred tax liabilities	352	180
Other liabilities	31	38
Total liabilities	44,807	51,890
Commitments and Contingencies (Note 14)
Stockholders' equity:
Common stock	234	229
Additional paid-in capital	1,055,548	1,053,507
Treasury stock	(3,336)	(2,666)
Accumulated other comprehensive loss	(262)	(216)
Accumulated deficit	(985,764)	(978,635)
Total stockholders' equity	66,420	72,219
Total liabilities and stockholders' equity	$ 111,227	$ 124,109