Acquisitions - Additional Information (Detail)		9 Months Ended
	Jan. 16, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)
Number Of Employees	3
Business Acquisition Purchase Price Allocation Description	The purchase price for this acquisition was $2,424,000 cash paid at closing and the assumption of a liability of $20,000, plus a maximum of an additional $3,000,000 earn out, of which approximately $331,000 has been paid out as of September 30, 2015. The remaining balance of $2,669,000 is accrued on the consolidated balance sheet as of September 30, 2015
Tangible assets	$ 1,606,000
Intangible assets	1,500,000
Goodwill	$ 2,338,000
Intangible assets amotized period	6 years
Allocated Share Based Compensation Expense	$ 3,000,000	$ 162,000	$ 29,000