Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.20.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Significant Accounting Policies [Line Items]      
Restricted cash $ 125 $ 165  
Deposits 159 132  
Software costs capitalized 1,453 1,544 $ 1,641
Foreign currency translation loss $ 235 31 4
Minimum      
Significant Accounting Policies [Line Items]      
Intangible assets acquired, useful life 5 years    
Maximum      
Significant Accounting Policies [Line Items]      
Intangible assets acquired, useful life 18 years    
Leasehold improvements | Minimum      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful lives 8 years    
Leasehold improvements | Maximum      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful lives 10 years    
Other assets | Minimum      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful lives 3 years    
Other assets | Maximum      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful lives 5 years    
O&O      
Significant Accounting Policies [Line Items]      
Advertising expense $ 200 $ 135 $ 83
Customer A | Accounts Receivable      
Significant Accounting Policies [Line Items]      
Concentration risk 11.60% 25.70%  
Customer A | Sales      
Significant Accounting Policies [Line Items]      
Concentration risk 15.30% 28.60% 23.50%
Customer B | Accounts Receivable      
Significant Accounting Policies [Line Items]      
Concentration risk 11.50%    
Customer B | Sales      
Significant Accounting Policies [Line Items]      
Concentration risk     16.10%
Carrier Partner A | Sales      
Significant Accounting Policies [Line Items]      
Concentration risk 37.30% 45.90%  
Carrier Partner B | Sales      
Significant Accounting Policies [Line Items]      
Concentration risk 30.00% 38.70%  
Carrier Partner C | Sales      
Significant Accounting Policies [Line Items]      
Concentration risk 10.70%