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Commitments and Contingencies - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 02, 2017
Dec. 31, 2016
Loss Contingencies [Line Items]    
Business combination, final purchase price   $ 28,100,000
Loss contingency accrual   500,000
Subsequent Event [Member]    
Loss Contingencies [Line Items]    
Business combination, final purchase price $ 28,700,000  
Minimum [Member]    
Loss Contingencies [Line Items]    
Business combination, final purchase price   27,900,000
Maximum [Member]    
Loss Contingencies [Line Items]    
Business combination, final purchase price   $ 29,900,000