Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narrative) (Details)

v3.23.1
Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jan. 01, 2023
Jan. 01, 2022
Aug. 29, 2020
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common Stock, shares authorized       200,000,000   200,000,000
Stock-based compensation expense       $ 4,731 $ 5,563  
Stock options, unrecognized compensation expense       600    
Journey            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense       646 773  
Oaktree Note [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price of warrants     $ 3.20      
Percentage of market price of common stock for additional warrants     95.00%      
Warrants expiration date     Aug. 27, 2030      
Long-term Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense       1,400 1,300  
Fair value of stock granted       800   $ 2,800
LTIP, Percentage of outstanding shares 1.00% 1.00%        
Maximum | Oaktree Note [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Warrants issued     1,749,450      
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 1,219,294 1,219,294        
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 1,102,986 1,102,986        
Research and Development Expense [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense       900 1,400  
General and Administrative Expense [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation expense       3,800 4,100  
Restricted Stock Awards and Restricted Stock Units [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense for awards other than options       $ 19,600 $ 25,200  
Share-based compensation, period for recognition of expense       2 years 1 month 6 days 2 years 6 months  
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares Granted       2,578,588    
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares Granted       190,000