Income Taxes (Details 3) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Deferred tax assets related to:
U.S. and foreign net operating loss carryforwards	$ 30,922	$ 26,639
Book and tax basis differences for property and equipment	340	480
Bad debt, warranty and inventory reserves	683	732
Accrued compensation	1,363	970
Deferred revenue	60	23
U.S. credit carryforwards	2,068	608
Stock compensation	474	726
Acquired intangibles	0	11
Other	755	1,148
Deferred tax assets	36,665	31,337
Valuation allowance	(36,634)	(31,191)
Total deferred tax assets	31	146
Deferred tax liabilities related to:
Acquired intangibles	34	0
Total deferred tax liability	34	0
Deferred income taxes, net	$ (3)	$ 146