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Sale-leaseback Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 02, 2016
Jun. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Sale Leaseback Transaction [Line Items]        
Gross proceeds from sale and leaseback agreement     $ 11,000,000  
Sublease agreement period 5 years      
Weighted average effective interest rate of sale leaseback financing liability 2.22%      
Impairment charges   $ 0 0  
Gain on sale of facility $ 2,400,000      
Capital lease obligations $ 5,700,000      
Capital lease weighted average interest rate 3.43%      
Denton, Texas Facility [Member]        
Sale Leaseback Transaction [Line Items]        
Gross proceeds from sale and leaseback agreement $ 5,000,000      
Sale leaseback transaction costs 300,000      
Net proceeds from sale and leaseback agreement $ 4,700,000      
Lease agreement period 13 years      
Sale leaseback transaction, net carrying value   12,900,000 $ 12,900,000 $ 13,100,000
Impairment charges   $ 0    
Telford, Pennsylvania Facility [Member]        
Sale Leaseback Transaction [Line Items]        
Gross proceeds from sale and leaseback agreement $ 6,000,000      
Sale leaseback transaction costs 400,000      
Net proceeds from sale and leaseback agreement $ 5,600,000      
Lease agreement period 13 years