Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Detail)

v3.21.1
Summary of Significant Accounting Policies (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Significant Accounting Policies [Line Items]                      
Net revenues $ 95,082,000 $ 88,592,000 $ 70,893,000 $ 59,012,000 $ 39,351,000 $ 36,016,000 $ 32,795,000 $ 30,553,000 $ 313,579,000 $ 138,715,000 $ 103,569,000
Revenue, contract terms                 customer contract per-device license fee model for a two-to-four year software as a service ("SaaS") license agreement    
Software costs capitalized                 $ 8,859,000 1,453,000 1,544,000
Foreign currency translation loss                 312,000 235,000 31,000
Restricted cash 340,000       125,000       340,000 125,000  
Deposits 201,000       159,000       201,000 159,000  
Asset impairment charges                 0 0 0
Cash, uninsured amount $ 27,128,000       $ 20,203,000       27,128,000 20,203,000  
Application Media                      
Significant Accounting Policies [Line Items]                      
Net revenues                 217,447,000 133,898,000 103,569,000
Content Media                      
Significant Accounting Policies [Line Items]                      
Net revenues                 $ 96,132,000 $ 4,817,000 $ 0
Minimum                      
Significant Accounting Policies [Line Items]                      
Intangible assets, useful life                 5 years    
Maximum                      
Significant Accounting Policies [Line Items]                      
Intangible assets, 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    
Internally developed software to be sold                      
Significant Accounting Policies [Line Items]                      
Property and equipment, estimated useful lives                 3 years    
Customer A | Accounts Receivable                      
Significant Accounting Policies [Line Items]                      
Concentration risk                 13.00% 11.60%  
Customer A | Sales                      
Significant Accounting Policies [Line Items]                      
Concentration risk                   15.30% 28.60%
Customer B | Accounts Receivable                      
Significant Accounting Policies [Line Items]                      
Concentration risk                   11.50%  
Carrier Partner A | Sales                      
Significant Accounting Policies [Line Items]                      
Concentration risk                 26.40% 37.30% 45.90%
Carrier Partner B | Sales                      
Significant Accounting Policies [Line Items]                      
Concentration risk                 22.30% 30.00% 38.70%
Carrier Partner C | Sales                      
Significant Accounting Policies [Line Items]                      
Concentration risk                 18.50% 10.70%  
Carrier Partner D | Sales                      
Significant Accounting Policies [Line Items]                      
Concentration risk                 10.80%