XML 86 R72.htm IDEA: XBRL DOCUMENT v3.24.0.1
Stock-based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Apr. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of remaining securities available for future issuance (in shares) 6,445    
Share price (in dollars per share) $ 2.21    
2011 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of remaining securities available for future issuance (in shares) 4,656    
Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate intrinsic value, vested and released $ 100,000 $ 0  
Total unrecognized compensation cost related to stock-based compensation arrangements $ 12,400,000    
Weighted average remaining contractual terms 2 years 3 months 18 days    
2017 Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of remaining securities available for future issuance (in shares) 1,581    
2022 Inducement Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of remaining securities available for future issuance (in shares) 208   9,500
Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of months over which options vest ratably 36 months    
Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of months over which options vest ratably 48 months    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 4 years    
Award vesting percentage 25.00%    
Total unrecognized compensation cost related to stock-based compensation arrangements $ 13,900,000    
Weighted average remaining contractual terms 2 years 6 months    
Restricted Stock Units (RSUs) | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Rate at which outstanding options vest on the first anniversary of the option grant date 25.00%    
Share-Based Payment Arrangement      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration period 10 years    
Stock option grants exercise price minimum percentage on fair market value 100.00%    
Performance Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance period 3 years    
Performance Shares | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of performance period 0.00%    
Performance Shares | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of performance period 200.00%