Annual report pursuant to Section 13 and 15(d)

Acquisitions and Loss on Impairment of TLL, LLC - Additional Information (Detail)

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Acquisitions and Loss on Impairment of TLL, LLC - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 01, 2016
May 05, 2016
Feb. 02, 2016
Jan. 31, 2016
Aug. 03, 2015
Feb. 02, 2015
Jan. 31, 2017
May 31, 2016
Feb. 29, 2016
Jan. 31, 2017
Jul. 31, 2016
Jan. 31, 2016
Jan. 31, 2017
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Feb. 28, 2015
Business Acquisition [Line Items]                                  
Payments to acquire business                           $ 5,243,000 $ 11,686,000    
Acquisition, goodwill identified                           7,255,000      
Revenue                           83,795,000 106,992,000 $ 115,435,000  
Operating loss                           (54,146,000) (48,199,000) (26,453,000)  
Loss on impairment             $ 500,000     $ 23,500,000   $ 21,500,000   23,772,000 21,464,000    
Contingent consideration liability, fair value       $ 0               0     0   $ 3,200,000
Severance and restructuring charges                           7,151,000 1,061,000 $ 3,623,000  
Timeline Labs [Member]                                  
Business Acquisition [Line Items]                                  
Percentage of equity interest acquired           100.00%                      
Net purchase price of acquired business           $ 22,639,000                      
Payments to acquire business           14,186,000                      
Acquisition, goodwill identified           15,800,000                      
Loss on impairment       21,900,000                     21,900,000    
Business acquisition related costs                             100,000    
Indemnification assets           $ 1,400,000                      
Business acquisition, number of common stock issued     542,274   260,537 344,055   70,473                  
Common stock deposited into escrow           173,265                      
Business acquisition, value of common stock issued     $ 3,200,000   $ 1,800,000 $ 4,959,000   $ 200,000                  
Contingent consideration liability, fair value       $ 0     $ 0     0   $ 0 $ 0 0 0    
Loss on impairment due to reversal of contingent consideration liability                           400,000 $ 400,000    
Severance and restructuring charges                 $ 700,000         700,000      
DCC Labs [Member]                                  
Business Acquisition [Line Items]                                  
Percentage of equity interest acquired   100.00%                              
Payments to acquire business, paid in shares   $ 2,700,000                              
Cash held in escrow   500,000                              
Net purchase price of acquired business   7,883,000                              
Payments to acquire business   5,243,000                              
Acquisition, goodwill identified   $ 7,300,000                              
Net increase in goodwill                   $ 1,900,000              
Revenue                         700,000        
Operating loss                         $ 4,700,000        
Business acquisition date                         May 05, 2016        
Loss on impairment $ 23,500,000                       $ 3,400,000        
Business acquisition related costs                           $ 200,000      
Severance and restructuring charges                     $ 1,900,000