Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Current assets
Cash and cash equivalents	$ 107,912	$ 60,638
Accounts receivable, net	28,472	23,128
Inventories	16,897	17,440
Marketable securities	704	684
Prepaid expenses and other current assets	5,074	2,992
Total current assets	159,059	104,882
Property and equipment, net	29,696	32,471
Patents, net	5,056	5,013
Other assets	129	40
Total assets	193,940	142,406
Current liabilities
Accounts payable	10,736	8,506
Accrued expenses	30,236	26,993
Total current liabilities	40,972	35,499
Long-term liabilities
Financing obligation	21,100	0
Deferred revenue	10,000	0
Other liabilities	3,479	6,010
Total liabilities	75,551	41,509
Commitments and contingencies
Common stock, $0.001 par value at June 30, 2017 and 2016; authorized 100,000,000 common shares at June 30, 2017 and 2016; issued and outstanding 32,849,563 at June 30, 2017 and 32,792,497 at June 30, 2016	33	33
Additional paid in capital	447,559	428,235
Accumulated other comprehensive income	100	40
Accumulated deficit	(329,303)	(327,411)
Total stockholders’ equity	118,389	100,897
Total liabilities and stockholders’ equity	$ 193,940	$ 142,406