Property and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Depreciation	$ 1,248,000	$ 807,000	$ 983,000
Impairment of long-lived assets held-for-use			$ 450,000