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Stock-based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Mar. 30, 2021
Jun. 01, 2018
Jun. 30, 2022
Jun. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Options to purchase, Granted (in shares)     135,000  
Options cancelled to purchase common stock     44,375  
Stock-based compensation expense     $ 214 $ 211
Restricted common stock granted 25,000      
Restricted common stock granted 25,000      
David Ludwig And Tom Ludwig [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Restricted common stock granted   600,000    
Restricted common stock granted   600,000    
Common Stock Options [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock-based compensation expense     200  
Unrecognized stock-based compensation     $ 1,100  
Unrecognized stock-based compensation, Period for recognition     2 years 10 months 24 days  
Restricted Stock [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock-based compensation expense     $ 25,800  
Shares restriction term of service 2 years      
Weighted average grant date fair value     $ 0.43  
Unrecognized stock-based compensation expense     $ 47,300  
Restricted Stock [Member] | David Ludwig And Tom Ludwig [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Shares restriction term of service   5 years    
Equity Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Common stock shares authorized for issuance under plan     3,500,000  
Employees [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Options to purchase, Granted (in shares)     13,500  
Employees [Member] | Equity Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock issued during the period under employee stock purchase plan     0  
Directors [Member] | Equity Incentive Plan [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Stock issued during the period under employee stock purchase plan     0