Annual report pursuant to Section 13 and 15(d)

Notes Payable to Former Stockholders - Additional Information (Detail)

v2.4.0.8
Notes Payable to Former Stockholders - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Notes Payable [Line Items]  
Accrued interest expense pertaining to Notes $ 400,000
Interest expense related to notes payable from former stockholders prior to IPO 318,000
Restricted Stock [Member]
 
Notes Payable [Line Items]  
Unsecured notes payable interest rate 5.00%
Unsecured notes payable maturity date Apr. 14, 2020
SARs [Member]
 
Notes Payable [Line Items]  
Unsecured notes payable interest rate 5.00%
Unsecured notes payable maturity date Apr. 14, 2020
Selling, general and administrative expenses [Member]
 
Notes Payable [Line Items]  
Interest expense related to notes payable from former stockholders subsequent to IPO $ 100,000