Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Significant Accounting Policies [Line Items]      
Restricted cash $ 165 $ 331  
Deposits 132 151  
Software costs capitalized 1,544 1,641 $ 1,387
Foreign currency translation adjustment (31) $ (4) (119)
Impairment     $ 2,756
XYO      
Significant Accounting Policies [Line Items]      
Impairment $ 757    
Minimum      
Significant Accounting Policies [Line Items]      
Intangible assets acquired, useful life 2 years    
Maximum      
Significant Accounting Policies [Line Items]      
Intangible assets acquired, useful life 14 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    
Customer A | Accounts Receivable      
Significant Accounting Policies [Line Items]      
Concentrations of credit risk, percentage 25.70% 28.30%  
Customer A | Sales      
Significant Accounting Policies [Line Items]      
Concentrations of credit risk, percentage 28.60% 23.50% 26.10%
Customer B | Sales      
Significant Accounting Policies [Line Items]      
Concentrations of credit risk, percentage   16.10% 21.90%
O&O      
Significant Accounting Policies [Line Items]      
Advertising expense $ 135 $ 83 $ 263
Carriers and OEMs | Minimum      
Significant Accounting Policies [Line Items]      
Customer contract term 2 years    
Carriers and OEMs | Maximum      
Significant Accounting Policies [Line Items]      
Customer contract term 4 years