Quarterly report pursuant to Section 13 or 15(d)

Lines of Credit and Other Borrowings - Additional Information (Detail)

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Lines of Credit and Other Borrowings - Additional Information (Detail)
 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 28, 2014
USD ($)
Jun. 03, 2014
USD ($)
May. 31, 2014
USD ($)
May. 05, 2014
USD ($)
Apr. 10, 2014
USD ($)
Mar. 04, 2014
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Agreement
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Line Of Credit Facility [Line Items]                    
Repayments under Credit Agreements                 $ 21,508,000  
Interest expense incurred for lines of credit and loan and security agreement             $ 37,000   451,000  
Accrued interest payable                   $ 0
Amortization of discounts on lines of credit             0   200,000  
Amortization of debt issuance costs             0   128,000  
Restricted cash equivalent               $ 200,000   $ 0
Aggregate agreements amendment fee.             $ 10,000   $ 55,000  
Credit Agreements                    
Line Of Credit Facility [Line Items]                    
Number revolving credit facility agreements | Agreement               2    
Repayments under Credit Agreements $ 2,900,000                  
Line of credit facility, expiration date                   May 01, 2014
Forbearance Agreement                    
Line Of Credit Facility [Line Items]                    
Credit agreements amendment fee         $ 10,000 $ 10,000        
Lines of credit maximum borrowing capacity         $ 4,000,000 $ 5,000,000        
Amendment No. 1                    
Line Of Credit Facility [Line Items]                    
Line of credit facility, expiration date       Jun. 01, 2014            
Revolving lines of credit fee paid       $ 10,000            
Amendment No. 2                    
Line Of Credit Facility [Line Items]                    
Line of credit facility, expiration date   Aug. 01, 2014                
Revolving lines of credit fee paid   $ 15,000                
Increase decrease in interest rate of lines of credit facility   0.50%                
Prime floor, daily prime plus LIBOR             2.50% 2.50% 2.50%  
Unused capacity commitment fee percentage               0.25%    
Amendment No. 2 | Domestic Revolver Credit Facility | Prime Rate                    
Line Of Credit Facility [Line Items]                    
Interest on principal balance rate plus               2.50%    
Amendment No. 2 | Ex-Im Revolver | Prime Rate | Minimum                    
Line Of Credit Facility [Line Items]                    
Interest on principal balance rate plus               2.00%    
Amendment No. 3                    
Line Of Credit Facility [Line Items]                    
Line of credit facility, expiration date     Aug. 01, 2014              
Revolving lines of credit fee paid     $ 10,000