Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.21.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 11, 2019
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jan. 01, 2021
Jul. 31, 2020
Loss Contingencies [Line Items]            
Cash paid for amounts included in the present value of operating lease liabilities   $ 16        
Contingent severance obligation accrual       $ 2,000    
Transaction Bonus Plan ("Plan")            
Loss Contingencies [Line Items]            
Percentage of consideration payable 10.00%          
Term of plan 3 years          
Chief Executive Officer | Transaction Bonus Plan ("Plan")            
Loss Contingencies [Line Items]            
Percentage of ownership interest in plan 50.00%          
Chief Financial Officer | Transaction Bonus Plan ("Plan")            
Loss Contingencies [Line Items]            
Percentage of ownership interest in plan 10.00%          
Other Key Employees [Member] | Transaction Bonus Plan ("Plan")            
Loss Contingencies [Line Items]            
Percentage of ownership interest in plan 40.00%          
Consultants [Member] | Transaction Bonus Plan ("Plan")            
Loss Contingencies [Line Items]            
Percentage of ownership interest in plan 9.00%          
Pearson Action            
Loss Contingencies [Line Items]            
Contingent severance obligation accrual           $ 2,000
Accounting Standards Update 2016-02            
Loss Contingencies [Line Items]            
Initial right-of-use asset         $ 1,179  
Cost of Revenues            
Loss Contingencies [Line Items]            
Royalty expense   $ 362 $ 351      
Wireless Essential Patent Holders            
Loss Contingencies [Line Items]            
Royalty expire year   2021        
Wireless Essential Patent Holders | Maximum            
Loss Contingencies [Line Items]            
Royalty payment percent of net revenues   5.00%        
Other Providers of Integrated Technologies            
Loss Contingencies [Line Items]            
Royalty expire year   2023        
Other Providers of Integrated Technologies | Maximum            
Loss Contingencies [Line Items]            
Royalty payment percent of net revenues   5.00%