Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.20.1
Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate intrinsic value of options exercised $ 17  
Fair value of options vested $ 34  
2018 Stock Option and Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Issuance of common stock shares (in shares) 1,385,862  
Common stock reserved for issuance (in shares) 712,874 205,206
2018 Employee Stock Purchase Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Common stock reserved for issuance (in shares) 272,942 272,942
Expiration period 27 months  
ESPP, purchase price percentage 85.00%  
2009 Stock Option and Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unvested shares (in shares) 4,689 6,219
Accrued expenses $ 3 $ 3
Unamortized fair value of restricted stock units $ 6,300  
Weighed-average period of costs amortized 2 years 6 months  
Unrecognized stock compensation expense $ 177  
Selling and Marketing Expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Maximum number of shares participant may purchase 2,000  
Restricted Stock Units (RSUs) - Non-Employee Directors | Share-based Payment Arrangement, Tranche One    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock unit awards granted (in shares) 123,084  
Restricted Stock Units (RSUs) - Non-Employee Directors | Share-based Payment Arrangement, Tranche Two    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock unit awards granted (in shares) 125,523  
Employee Stock | 2018 Employee Stock Purchase Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Annual percentage increase 3.00%  
Percent of shares outstanding on last day 1.50%  
Restricted Stock Units (RSUs) - Team Members    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock unit awards granted (in shares) 756,000  
Restricted Stock Units (RSUs) - Team Members | Share-based Payment Arrangement, Tranche One    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units awards grant date fair value (in dollars per share) $ 1.25  
Restricted Stock Units (RSUs) - Team Members | Share-based Payment Arrangement, Tranche Two    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units awards grant date fair value (in dollars per share) $ 1.25  
Vesting period of award 10 months  
Restricted Stock Units (RSUs) - Non-Employees    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock unit awards granted (in shares) 610,000  
Restricted stock units awards grant date fair value (in dollars per share) $ 0.89  
Vesting period of award 42 months  
Post-Closing Outstanding Shares | Employee Stock | 2018 Stock Option and Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Annual percentage increase 10.00%  
Outstanding Shares on Last Day of Immediately Preceding Year | Employee Stock | 2018 Stock Option and Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Annual percentage increase 5.00%