Annual report pursuant to Section 13 and 15(d)

Employee Benefit 401(k) Plans (Narrative) (Details)

v3.22.0.1
Employee Benefit 401(k) Plans (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Minimum employee subscription rate, percentage of compensation 1.00%    
Maximum employee subscription rate, percentage of compensation 60.00%    
Employee pre-tax contributions vested percentage 100.00%    
Vesting rate 20.00%    
Percentage vested after total service period 100.00%    
Expenses for employee benefit plan $ 537 $ 771 $ 773
Minimum [Member]      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Employer contribution vesting period 2 years    
Maximum [Member]      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Employer contribution vesting period 6 years