Quarterly Financial Data - Quarterly Financial Data Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 9,056	$ 10,556	$ 8,106	$ 8,741	$ 8,479	$ 11,267	$ 8,878	$ 7,206	$ 36,459	$ 35,830
Gross margin	6,450	7,088	6,216	6,070	5,871	7,789	6,499	5,396	25,824	25,555
Loss from operations	(908)	(885)	(1,072)	(1,227)	(1,357)	(77)	(1,022)	(626)	(4,092)	(3,082)
Equity in earnings from investment in Mediasite KK							15	23
Net income (loss)	$ (1,222)	$ (921)	$ (1,350)	$ (1,032)	$ (1,288)	$ 33	$ (871)	$ (690)	$ (4,525)	$ (2,816)
Basic and diluted net income (loss) per share	$ (0.28)	$ (0.21)	$ (0.31)	$ (0.24)	$ (0.30)	$ 0.01	$ (0.21)	$ (0.17)