Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock permitted to be granted	700,000
Equity Incentive Plan, term	10 years
Shares of common stock reserved for issuance	352,940
Stock-based compensation	$ 1.0	$ 1.3	$ 1.2
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted	107,662	100,000	200,000
Restricted stock, weighted average fair value	$ 1.2	$ 1.3	$ 1.9
Employee restricted stock award, vesting period	2 years
Restricted stock award, percentage vested on grant date	33.33%
Nonemployee restricted stock award vest grant over period	1 year
Unrecognized compensation cost	$ 0.3
Unrecognized compensation cost, recognition period	15 months
Shares tendered by employees to satisfy minimum statutory tax withholding obligations	27,259