Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.20.1
Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 25, 2019
USD ($)
shares
Jan. 01, 2019
USD ($)
Jan. 31, 2019
USD ($)
Mar. 31, 2020
Lease
Dec. 31, 2019
USD ($)
ft²
Lease
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Commitment And Contingencies [Line Items]              
Operating lease, options to renew term         1 year    
Lessee, Operating Lease, Existence of Option to Extend [true false]         true    
Area of corporate headquarters and manufacturing facility | ft²         57,000    
Lease expiration date         Jun. 30, 2020    
Lease agreement entry date         2020-02    
Operating lease, right-of-use asset         $ 276,000    
Operating lease, liability         326,000    
Lessee, operating lease incremental borrowing rate   12.78%          
Operating lease payments         $ 797,000    
Weighted-average remaining lease term         7 months 6 days    
Operating lease not yet commenced description         As of December 31, 2019 the Company had no leases that had not commenced.    
Number of operating leases not yet commenced | Lease         0    
Rent expense         $ 800,000 $ 800,000 $ 1,000,000
Purchase commitments pending         9,800,000    
Contingent gain (loss) on patent litigation settlement           (1,500,000)  
Accrued liability         4,744,000 7,538,000  
Employee Arrangements and Other Compensation              
Commitment And Contingencies [Line Items]              
Change in control, if occurs, may require severance benefits payable         3,000,000 3,000,000  
Accrued for performance bonuses         $ 200,000 300,000  
Patent Litigation | Settlement Agreement              
Commitment And Contingencies [Line Items]              
Settlement agreement date January 25, 2019            
Number of days litigation settlement to be paid in cash 5 days            
Litigation settlement in cash $ 500,000            
Number of days litigation settlement shares to be issued 30 days            
Litigation settlement share issued | shares 500,000            
Number of days litigation settlement to be paid in value of stock consideration 30 days            
Settlement agreement, terms         The Company has agreed (i) to pay to CAO, within five days of the Effective Date, $500,000 in cash, (ii) to issue to CAO, within 30 days of the Effective Date, 500,000 restricted shares of common stock of the Company (the “Stock Consideration”), and (iii) to pay to CAO, within 30 days of December 31, 2021, an amount in cash equal to the difference (if positive) between $1,000,000 and the value of the Stock Consideration on December 31, 2021.    
Litigation settlement amount in cash equal to difference between value of stock consideration $ 1,000,000            
Contingent gain (loss) on patent litigation settlement         $ 0 $ (1,500,000)  
Payment for litigation settlement in cash     $ 500,000        
Accrued liability         $ 1,000,000    
Office Space | Scenario Forecast              
Commitment And Contingencies [Line Items]              
Number of operating leases | Lease       2      
ASU 2016-02              
Commitment And Contingencies [Line Items]              
Operating lease, right-of-use asset   $ 800,000          
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List   us-gaap:OtherAssetsNoncurrent          
Adjustment for deferred rent   $ 200,000          
Operating Lease, Liability, Statement of Financial Position [Extensible List]   us-gaap:AccruedLiabilitiesCurrent          
Operating lease, liability   $ 1,000,000          
Cumulative-effect adjustment to retained earnings   $ 0          
Minimum              
Commitment And Contingencies [Line Items]              
Lease term         1 year    
Maximum              
Commitment And Contingencies [Line Items]              
Lease term         5 years    
Weighted-average remaining lease term         1 year