Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Narrative) (Details)

v3.22.1
Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Jan. 01, 2022
Jan. 01, 2021
Aug. 29, 2020
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense       $ 5,563 $ 3,773
Stock options, unrecognized compensation expense       0  
Journey [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense       773 22
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       $ 1,300 1,000
Number of shares Granted 1,102,986 1,030,339      
Fair value of stock granted $ 2,800 $ 3,300      
LTIP, Percentage of outstanding shares       1.00%  
Long-Term Incentive Program condition, increase in market capitalization       $ 100,000  
Maximum [Member] | Oaktree Note [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     1,749,450    
Research and Development Expense [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense       1,400 1,200
General and Administrative Expense [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense       4,100 2,600
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       $ 25,200 $ 21,800
Share-based compensation, period for recognition of expense       2 years 6 months 3 years 7 months 6 days
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares Granted       2,375,972  
Restricted Stock Units (RSUs) [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares Granted       375,602