Stock-Based Compensation - Summary of Restricted Stock Units (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013
Time-Based Restricted Stock Units [Member]
Performance Restricted Stock Units [Line Items]
Number of Shares, Beginning balance		88,821
Number of Shares, Granted		80,270
Number of Shares, Vested		(83,821)
Number of Shares, Forfeited or expired
Number of Shares, Ending balance	85,270	85,270
Weighted-Average Grant Date Fair Value, Beginning balance		$ 3.12
Weighted-Average Grant Date Fair Value, Granted		$ 4.00
Weighted-Average Grant Date Fair Value, Vested		$ 3.76
Weighted-Average Grant Date Fair Value, Forfeited or expired
Weighted-Average Grant Date Fair Value, Ending balance	$ 3.32	$ 3.32
Performance-Based Restricted Stock Units [Member]
Performance Restricted Stock Units [Line Items]
Number of Shares, Beginning balance
Number of Shares, Granted	55,000	313,000
Number of Shares, Vested
Number of Shares, Forfeited or expired
Number of Shares, Ending balance	313,000	313,000
Weighted-Average Grant Date Fair Value, Beginning balance
Weighted-Average Grant Date Fair Value, Granted		$ 4.26
Weighted-Average Grant Date Fair Value, Vested
Weighted-Average Grant Date Fair Value, Forfeited or expired
Weighted-Average Grant Date Fair Value, Ending balance	$ 4.26	$ 4.26