Mediasite KK - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Contributed revenue	$ 10,556,000	$ 11,267,000	$ 27,403,000	$ 27,351,000
Net income (loss) for acquisition period	(921,000)	33,000	(3,303,000)	(1,528,000)
Mediasite KK [Member]
Business Acquisition [Line Items]
Contributed revenue	1,100,000	880,000	3,800,000	3,100,000
Net income (loss) for acquisition period	$ (285,000)	$ (187,000)	$ (185,000)	$ 113,000