Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net loss	$ (72)	$ (225)
Adjustments to reconcile net loss to net cash provided by operating activities:
Share-based compensation	877	645
Depreciation and amortization	336	455
Provision for excess and obsolete inventories	162	74
Changes in operating assets and liabilities:
Accounts receivable	(402)	337
Inventories	(581)	(1,154)
Contract manufacturers' receivable	(245)	55
Prepaid expenses and other current assets	(68)	44
Other assets	(32)	11
Accounts payable	1,456	(19)
Accrued payroll and related expenses	(959)	806
Warranty reserve	(12)	(22)
Other liabilities	265	457
Net cash provided by operating activities	725	1,464
Investing activities
Purchases of property and equipment	(171)	(144)
Net cash used in investing activities	(171)	(144)
Financing activities
Tax withholding paid on behalf of employees for restricted shares	(145)	(144)
Net proceeds from issuances of common stock	518	300
Payment of capital lease obligations	(45)	(49)
Net cash provided by financing activities	328	107
Increase in cash and cash equivalents	882	1,427
Cash and cash equivalents at beginning of period	8,073	5,962
Cash and cash equivalents at end of period	$ 8,955	$ 7,389