Note Payable - Additional Information (Detail) (9.5% Senior Secured Notes [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Debt Obligations [Line Items]
Issuance of senior secured notes	$ 45,000
Note bears interest rate	9.50%
Debt issuance costs, amortized date	Jan. 04, 2018
Available liquidity	10,000
Debt issuance costs	1,390
Amortization of debt issuance costs	$ 70	$ 75
Maximum [Member]
Debt Obligations [Line Items]
Leverage ratio	4.5
Minimum [Member]
Debt Obligations [Line Items]
Leverage ratio	1.0