Acquisitions (HEE) - Additional Information (Detail) - HEE [Member] - USD ($)		9 Months Ended		12 Months Ended
	Aug. 13, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Cash paid on acquisition	$ 7,000,000
Shares issued for acquired subsidiary	34,626
Fair value of common stock issued	$ 500,000
Earn out expenses	$ 2,000,000	$ 0		$ 0
Trading day period	30 days
Restrictions on sale or transfer for periods range	9 months
First year estimated earn-out payable		700,000
Remainder of estimated earn-out payable		1,300,000
Revenue from acquired entity		9,200,000	$ 400,000
Net income from acquired entity		$ 1,100,000	$ 0
Thirty Trading Days [Member]
Business Acquisition [Line Items]
Fair value of common stock issued	$ 500,000