Quarterly report pursuant to Section 13 or 15(d)

Acquisition of TLL, LLC - Additional Information (Detail)

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Acquisition of TLL, LLC - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 03, 2015
Feb. 02, 2015
Jul. 31, 2015
Jul. 31, 2015
Jan. 31, 2015
Business Acquisition [Line Items]          
Payments to acquire business       $ 11,686  
Contingent consideration liability, fair value     $ 500 500  
Contingent consideration liability, fair value of employee portion     2,600 2,600  
Contingent consideration     1,487 1,487  
Fair value of acquisition related contingent consideration     481 983  
Goodwill     57,632 57,632 $ 41,008
Timeline Labs [Member]          
Business Acquisition [Line Items]          
Percentage of equity interest acquired   100.00%      
Payments to acquire business   $ 14,186      
Preliminary working capital adjustments   200      
Indemnification assets   $ 1,400      
Business acquisition, number of common stock issued   344,055      
Common stock deposited into escrow   173,265      
Fair value of common stock issuance   $ 6,500      
Business acquisition, value of common stock issued   6,543      
Contingent consideration   509 $ 1,000 1,000  
Goodwill   $ 17,246      
Business acquisition related costs       $ 100  
Timeline Labs [Member] | Subsequent Event [Member]          
Business Acquisition [Line Items]          
Business acquisition, number of common stock issued 260,537        
Business acquisition, value of common stock issued $ 1,800