XML 69 R58.htm IDEA: XBRL DOCUMENT v3.19.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
12 Months Ended
Jan. 31, 2019
May 30, 2019
Apr. 30, 2019
Commitments And Contingencies Disclosure [Line Items]      
Non-cancelable purchase commitments $ 4,200,000   $ 3,900,000
Loss contingencies     0
Tax litigation amount 600,000    
Cumulative charges of litigation loss 300,000    
Subsequent Event      
Commitments And Contingencies Disclosure [Line Items]      
Settlement fund for payment to class members   $ 8,650,000  
Other current assets      
Commitments And Contingencies Disclosure [Line Items]      
Amount of receivables in other current assets 300,000    
Global Telecomm Corporation      
Commitments And Contingencies Disclosure [Line Items]      
Non-cancelable purchase commitments $ 0   $ 700,000