Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Current assets
Cash and cash equivalents	$ 62,174	$ 83,842
Accounts receivable, net	23,048	30,830
Inventories	18,226	13,966
Marketable securities	1,909	1,876
Prepaid expenses and other current assets	1,388	3,380
Total current assets	106,745	133,894
Property and equipment, net	33,224	32,883
Patents, net	4,952	4,511
Other assets	88	40
Total assets	145,009	171,328
Current liabilities
Accounts payable	8,338	9,763
Accrued expenses	26,649	20,125
Total current liabilities	34,987	29,888
Long-term liabilities
Other liabilities	8,251	2,005
Total liabilities	43,238	31,893
Commitments and contingencies	0	0
Common stock, $0.001 par value; authorized 100,000,000 common shares at March 31, 2016 and June 30, 2015; issued and outstanding 32,684,195 at March 31, 2016 and 31,898,124 at June 30, 2015, respectively	33	32
Additional paid in capital	424,178	410,700
Accumulated other comprehensive income	86	90
Accumulated deficit	(322,526)	(271,387)
Total stockholders’ equity	101,771	139,435
Total liabilities and stockholders’ equity	$ 145,009	$ 171,328