Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.20.2
Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate intrinsic value of options exercised     $ 43  
Fair value of options vested     $ 64  
2018 Stock Option and Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock shares (in shares)     1,254,166  
Common stock reserved for issuance (in shares) 221,388   221,388 205,206
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   272,942 272,942
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]        
Vesting period of award     4 years  
Expiration period     10 years  
Unvested shares (in shares) 1,485   1,485 6,219
Accrued expenses $ 1   $ 1 $ 3
Unamortized fair value of restricted stock units 5,018   $ 5,018  
Weighed-average period of costs amortized     2 years 7 months 6 days  
Unrecognized stock compensation expense $ 141   $ 141  
Selling and Marketing Expense        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares participant may purchase     2,000  
Employee Stock | 2018 Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual percentage increase 3.00%   3.00%  
Percent of shares outstanding on last day 1.50%   1.50%  
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) 85,996 123,084    
Restricted stock units awards grant date fair value (in dollars per share) $ 0.71   $ 0.71  
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) 375,000 125,523    
Restricted stock units awards grant date fair value (in dollars per share) $ 0.67   0.67  
Vesting percentage of award (as a percent) 25.00%      
Vesting period of award 4 years      
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) 250,000 610,000    
Restricted stock units awards grant date fair value (in dollars per share) $ 0.67 $ 0.89 $ 0.67  
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%   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%   5.00%