Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Revenue, Major Customer [Line Items]
Product	$ 10,246	$ 9,974	$ 18,105	$ 18,468
Services	5,301	4,925	10,558	9,782
Revenue from external customers	15,547	14,899	28,663	28,250
Gross margin	9,449	9,376	16,632	17,233
Sales and marketing	(3,970)	(3,600)	(8,046)	(6,839)
Research and development	(2,816)	(3,762)	(6,123)	(7,599)
General and administrative	(225)	(236)	(431)	(411)
Operating income (loss) for reportable segments	2,438	1,778	2,032	2,384
Corporate and unallocated costs:
Sales and marketing	(398)	(197)	(797)	(352)
General and administrative	2,313	2,175	4,657	3,953
Gain on sale of product line, net	0	0	0	4,116
Shared Services And Other Not Related to Direct Conrtibution	(2,486)	(2,136)	(5,023)	222
Operating Income (Loss), Total	(48)	(358)	(2,991)	2,606
Interest income	13	6	40	9
Interest expense	1	0	4	0
Other income, net	51	24	170	147
Income (loss) before income taxes	15	(328)	(2,785)	2,762
Content Delivery Segment [Member]
Revenue, Major Customer [Line Items]
Product	4,916	6,174	7,356	10,123
Services	2,321	2,433	5,000	4,930
Revenue from external customers	7,237	8,607	12,356	15,053
Gross margin	4,309	5,616	6,834	9,342
Sales and marketing	(2,339)	(2,174)	(4,955)	(4,084)
Research and development	(1,832)	(2,798)	(4,057)	(5,669)
General and administrative	(75)	(60)	(148)	(117)
Operating income (loss) for reportable segments	63	584	(2,326)	(528)
Real time Segments [Member]
Revenue, Major Customer [Line Items]
Product	5,330	3,800	10,749	8,345
Services	2,980	2,492	5,558	4,852
Revenue from external customers	8,310	6,292	16,307	13,197
Gross margin	5,140	3,760	9,798	7,891
Sales and marketing	(1,631)	(1,426)	(3,091)	(2,755)
Research and development	(984)	(964)	(2,066)	(1,930)
General and administrative	(150)	(176)	(283)	(294)
Operating income (loss) for reportable segments	$ 2,375	$ 1,194	$ 4,358	$ 2,912