Income Taxes - Deferred Tax Assets and Liabilities - (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Deferred tax assets arising from:
Accrued liabilities and reserves	$ 492	$ 216
Deferred revenue	95	9
Bad debt reserves	52	93
Tangible property	127	117
Inventory reserves	756	343
Intangible assets	2,381	1,323
Other	43	44
Share-based compensation	161	4
Unrealized foreign currency gain		2
Foreign tax credit carryforward	288	122
Research and development tax credits	311	201
Alternative minimum tax credits	318	319
Tax effects of net operating loss carryforwards	3,855	2,117
Less valuation allowances	(4,933)	(1,925)
Deferred tax assets	3,946	2,985
Deferred tax liabilities arising from:
Property and equipment	(3,533)	(3,136)
Prepaid expenses	(126)	(154)
Unrealized foreign currency gain	(27)
Deferred tax liabilities	(3,686)	(3,290)
Net deferred tax liability		(305)
Net deferred tax asset	260
Other current assets
Income tax receivable
Income tax receivable	$ 500	$ 1,600