Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Current assets
Cash and cash equivalents	$ 115,280	$ 116,260
Accounts receivable, net	34,970	31,225
Inventories	19,304	16,605
Marketable securities	456	544
Prepaid expenses and other current assets	2,221	2,977
Total current assets	172,231	167,611
Property and equipment, net	27,607	27,744
Patents, net	5,242	5,231
Other assets	6,149	2,766
Total assets	211,229	203,352
Current liabilities
Accounts payable	12,396	10,441
Accrued expenses	26,489	25,776
Deferred revenue current	1,612	1,243
Total current liabilities	40,497	37,460
Long-term liabilities
Financing obligation	21,005	21,064
Deferred revenue noncurrent	7,230	8,946
Other liabilities	884	1,412
Total liabilities	69,616	68,882
Commitments and contingencies (see Note 7)
Common stock, $0.001 par value; authorized 100,000,000 common shares; issued and outstanding 34,828,214 at March 31, 2019 and 33,360,032 at June 30, 2018, respectively	34	33
Additional paid in capital	472,501	461,927
Accumulated other comprehensive income	0	101
Accumulated deficit	(330,922)	(327,591)
Total stockholders’ equity	141,613	134,470
Total liabilities and stockholders’ equity	$ 211,229	$ 203,352