Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities
Net loss	$ (2,470)	$ (83)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	578	478
Depreciation and amortization	147	105
Amortization of acquired intangible assets	144	0
Amortization of manufacturing profit in acquired inventory associated with acquisition	171	0
Changes in operating assets and liabilities:
Accounts receivable	863	(496)
Inventories	(474)	(55)
Contract manufacturers' receivable	905	95
Prepaid expenses and other current assets	(304)	(331)
Other assets	74	1
Accounts payable	(381)	11
Accrued payroll and related expenses	279	(836)
Warranty reserve	(8)	(7)
Other liabilities	(603)	644
Net cash used in operating activities	(1,079)	(474)
Investing activities
Purchases of property and equipment	(118)	(64)
Cash payment for acquisition of Maestro, net of cash and cash equivalents acquired	(5,073)	0
Net cash used in investing activities	(5,191)	(64)
Financing activities
Net proceeds from issuances of common stock	145	10,023
Tax withholding paid on behalf of employees for restricted shares	(127)	(113)
Payment of financing lease obligations	(2)	(15)
Net cash provided by financing activities	16	9,895
Increase (decrease) in cash and cash equivalents	(6,254)	9,357
Cash and cash equivalents at beginning of period	18,282	9,568
Cash and cash equivalents at end of period	$ 12,028	$ 18,925