Business Combinations - Pro Forma Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Revenue	$ 16,541	$ 14,205
Net income	$ 2,513	$ 3,614
Per share amounts:
Basic net income per share	$ 0.19	$ 0.27
Diluted net income per share	$ 0.19	$ 0.27
Creagh Medical and NorMedix [Member]
Business Acquisition [Line Items]
Revenue	$ 17,643	$ 14,796
Net income	$ 4,189	$ 2,263
Per share amounts:
Basic net income per share	$ 0.32	$ 0.17
Diluted net income per share	$ 0.32	$ 0.17