Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Additional Information (Detail)

v3.7.0.1
Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
May 05, 2016
Apr. 30, 2017
Apr. 30, 2016
Jan. 31, 2017
May 05, 2017
Business Acquisition [Line Items]          
Operating loss   $ (5,468) $ (9,575)    
DCC Labs [Member]          
Business Acquisition [Line Items]          
Percentage of equity interest acquired 100.00%        
Payments to acquire business, paid in shares $ 2,700        
Net purchase price of acquired business 7,883        
Payments to acquire business 5,243        
Cash held in escrow $ 500       $ 300
Shares initially held in escrow 681,278       227,092
Acquisition, goodwill identified $ 7,300        
Operating loss   $ 1,200      
Business acquisition date   May 05, 2016      
Business acquisition related costs       $ 200