Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Narrative) (Details)

v3.24.1
Stockholders' Equity (Narrative) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Aug. 10, 2023
Jan. 01, 2022
shares
Jan. 01, 2021
shares
Aug. 29, 2020
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Nov. 30, 2023
$ / shares
Jun. 13, 2023
$ / shares
Aug. 27, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Reverse Stock Split ratio 0.0667                
Common Stock, shares authorized | shares         200,000,000 200,000,000      
Stock-based compensation expense | $         $ 17,029 $ 22,987      
Stock options, unrecognized compensation expense | $         0        
Exercise price of warrants | $ / shares             $ 1.70 $ 8.136  
Change in fair value of Warrant liabilities | $         $ (4,424) (1,129)      
Share based compensation, additional shares authorized | shares         1,900,000        
Stock based compensation, vesting period         10 years        
Journey                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         $ 2,606 $ 4,425      
Oaktree Note [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Warrants issued | shares                 116,624
Exercise price of warrants | $ / shares       $ 48.00          
Percentage of market price of common stock for additional warrants       95.00%          
Warrants expiration date       Aug. 27, 2030          
2007 and 2013 Stock Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share based compensation, number of shares granted | shares         1,858,879        
Stock based compensation, shares available for issuance | shares         74,454        
2013 Stock Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share based compensation, additional shares authorized | shares         0.5 0.2      
2012 Employee Stock Purchase Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         $ 11,000,000 $ 100      
Predetermined fair value percentage during offering period         85.00%        
Shares purchased in connection with the ESPP offering | shares         100,000        
Number of shares available for future issuance | shares         100,000        
Long-term Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         $ 5,800 5,300      
Fair value of stock granted | $         $ 800 $ 2,800      
LTIP, Percentage of outstanding shares         1.00%        
Minimum | Oaktree Note [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Warrants issued | shares       100,000          
Chief Executive Officer (Dr. Rosenwald) [Member] | Long-term Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares Granted | shares   81,286 81,286            
Executive Vice President (Mr. Weiss) [Member] | Long-term Incentive Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares Granted | shares   73,532 73,532            
Employees and Non-Employees [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares Granted | shares         100,000 200,000      
Research and Development Expense [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         $ 3,200 $ 4,400      
General and Administrative Expense [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         13,800 18,500      
Interest Expense [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Change in fair value of Warrant liabilities | $         300        
Restricted Stock Awards and Restricted Stock Units [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $         16,000 21,900      
Fair value of stock granted | $         9,600 7,300      
Restricted Stock [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Unrecognized compensation expense for awards other than options | $         $ 10,600        
Number of shares Granted | shares         173,904        
Stock based compensation, vesting period         1 year 7 months 6 days        
Fair value of stock granted | $         $ 7,000 $ 1,700      
Restricted Stock [Member] | Executives and Directors [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares Granted | shares         300,000 200,000      
Restricted Stock [Member] | Non-Employee Directors [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Deferred compensation plan, shares issued | shares         27,000 22,000      
Restricted Stock Units (RSUs) [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Unrecognized compensation expense for awards other than options | $         $ 1,400        
Number of shares Granted | shares         169,466        
Stock based compensation, vesting period         1 year 8 months 12 days        
Fair value of stock granted | $         $ 2,100 $ 600