Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net revenue	[1]	$ 11,524	$ 9,964	$ 33,686	$ 30,077
Cost of revenue		5,126	5,186	15,776	15,643
Gross profit		6,398	4,778	17,910	14,434
Operating expenses:
Selling, general and administrative		4,414	3,469	12,129	11,008
Research and development		2,126	1,744	5,944	5,131
Total operating expenses		6,540	5,213	18,073	16,139
Loss from operations		(142)	(435)	(163)	(1,705)
Interest expense, net		(5)	(8)	(18)	(23)
Other income, net		2	0	3	47
Loss before income taxes		(145)	(443)	(178)	(1,681)
Provision for income taxes		17	13	47	34
Net loss		$ (162)	$ (456)	$ (225)	$ (1,715)
Net loss per share (basic and diluted)		$ (.01)	$ (.03)	$ (.01)	$ (.11)
Weighted-average common shares (basic and diluted)		17,522,000	15,225,000	17,374,000	15,163,000
Net revenue from related parties		$ 0	$ 0	$ 0	$ 113

[1] Includes net revenue from related parties