Acquisitions (SAT) - Additional Information (Detail) - SAT Technology, Inc. ("SAT") [Member] - USD ($)		9 Months Ended	12 Months Ended
	Sep. 26, 2014	Sep. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Equity interests acquired	100.00%
Cash paid on acquisition	$ 1,400,000
Cash held back	200,000
Adjustments to fair value of earn-out payable	$ 1,000,000	$ 0	$ 0
First year estimated earn-out payable		300,000
Remainder of estimated earn-out payable		700,000
Revenue from acquired entity		2,000,000
Net income from acquired entity		$ 500,000