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Commitments, Contingencies, and Other (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2022
May 27, 2022
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Health claim reinsurance limit per employee     $ 65,000   $ 65,000    
Expense for self-insurance claims     409,000 $ 359,000 905,000 $ 650,000  
Accrual for self-insurance claims     117,000   117,000    
Sales Agreement [Member]              
Common stock aggregate offering price   $ 9,600,000          
Commission rate of aggregate gross proceed   3.00%          
Legal and audit fees         77,000    
MSCO [Member] | Minimum [Member]              
Line of credit principal amount $ 15,000,000            
MSCO [Member] | Maximum [Member]              
Line of credit principal amount $ 25,000,000            
BMO Harris Bank [Member] | MSCO [Member]              
Interest expense     1,000 $ 1,000 1,000 $ 15,000  
Line of credit     $ 25,000,000   $ 25,000,000   $ 15,000,000