Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Revenue, Major Customer [Line Items]
Product	$ 9,430	$ 10,772	$ 27,535	$ 29,240
Services	5,551	4,684	16,109	14,466
Revenue from external customers	14,981	15,456	43,644	43,706
Gross margin	8,504	7,959	25,136	25,192
Sales and marketing	(3,735)	(3,791)	(11,781)	(10,630)
Research and development	(3,057)	(3,467)	(9,180)	(11,066)
General and administrative	(221)	(185)	(652)	(596)
Operating income (loss) for reportable segments	1,491	516	3,523	2,900
Corporate and unallocated costs:
Sales and marketing	(289)	(461)	(1,086)	(813)
General and administrative	2,996	2,150	7,653	6,103
Gain on sale of product line, net	0	0	0	4,116
Shared Services And Other Not Related to Direct Conrtibution	(3,064)	(2,426)	(8,087)	(2,204)
Operating Income (Loss), Total	(1,573)	(1,910)	(4,564)	696
Interest income	21	16	61	24
Interest expense	2	1	6	1
Other income, net	38	277	208	425
Income (loss) before income taxes	(1,516)	(1,618)	(4,301)	1,144
Content Delivery Segment [Member]
Revenue, Major Customer [Line Items]
Product	4,537	5,887	11,893	16,010
Services	2,908	2,250	7,908	7,180
Revenue from external customers	7,445	8,137	19,801	23,190
Gross margin	4,115	3,857	10,949	13,199
Sales and marketing	(2,288)	(2,381)	(7,243)	(6,465)
Research and development	(2,010)	(2,533)	(6,067)	(8,202)
General and administrative	(77)	(60)	(225)	(177)
Operating income (loss) for reportable segments	(260)	(1,117)	(2,586)	(1,645)
Real time Segments [Member]
Revenue, Major Customer [Line Items]
Product	4,893	4,885	15,642	13,230
Services	2,643	2,434	8,201	7,286
Revenue from external customers	7,536	7,319	23,843	20,516
Gross margin	4,389	4,102	14,187	11,993
Sales and marketing	(1,447)	(1,410)	(4,538)	(4,165)
Research and development	(1,047)	(934)	(3,113)	(2,864)
General and administrative	(144)	(125)	(427)	(419)
Operating income (loss) for reportable segments	$ 1,751	$ 1,633	$ 6,109	$ 4,545