Quarterly report pursuant to Section 13 or 15(d)

Stock compensation (Details)

v3.22.2
Stock compensation (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 23, 2022
USD ($)
shares
Apr. 30, 2021
USD ($)
shares
Jun. 30, 2022
USD ($)
installment
shares
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
installment
shares
Jun. 30, 2021
USD ($)
shares
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options forfeited (in shares)         0    
Options granted (in shares)         0    
Options exercised (in shares)         27,403    
Options outstanding (in shares)     132,167   132,167   159,570
Tax withholdings for share based payment arrangement | $         $ 1,318 $ 3,202  
Stock Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expiration period (in years)         10 years    
Compensation expense | $     $ 100 $ 200 $ 200 400  
Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock units forfeited (in shares)         55,976    
Compensation expense | $     $ 1,700 1,800 $ 2,200 $ 3,200  
Number of annual vesting installments | installment     5   5    
Stock units granted (in shares)         38,151    
Stock units vested (in shares)         22,209    
Tax withholdings for share based payment arrangement (in shares)         7,920 20,824  
Issuance of common stock in connection with share-based compensation (in shares)         12,528 28,439  
Awards outstanding (in shares)     78,557   78,557   118,591
Restricted Stock Units (RSUs) | Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Possible target award adjustment based on strategic and operational accomplishments     75.00%   75.00%    
Restricted Stock Units (RSUs) | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Possible target award adjustment based on strategic and operational accomplishments     125.00%   125.00%    
Restricted Stock Units (RSUs) | Chief Executive Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Payment for forfeited shares | $ $ 6,600            
Stock units forfeited (in shares) 41,186            
Restricted Stock Units (RSUs) | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Issuance of common stock in connection with share-based compensation (in shares)         0    
Restricted Stock Units (RSUs) | RSU Granted Prior to 2016              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period (in years)         6 years    
Restricted Stock Units (RSUs) | RSU Granted Prior to 2016 | Vesting period 1              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting percentage (as a percent)         20.00%    
Restricted Stock Units (RSUs) | RSU Granted Prior to 2016 | Vesting period 2              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting percentage (as a percent)         20.00%    
Restricted Stock Units (RSUs) | RSUs Granted During and Subsequent to 2016 | Vesting period 1              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period (in years)         5 years    
Vesting percentage (as a percent)         20.00%    
Restricted Stock Units (RSUs) | RSUs Granted During and Subsequent to 2016 | Vesting period 2              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period (in years)         3 years    
Restricted Stock Units (RSUs) | Retirement Plan for Non-Employee Directors | Director              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation expense | $   $ 1,600 $ 300 $ 300 $ 500 $ 500  
Issuance of common stock in connection with share-based compensation (in shares)   10,000     1,000    
Restricted Stock Units (RSUs) | Retirement Plan for Non-Employee Directors | Director | Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Issuance of common stock in connection with share-based compensation (in shares)         10,000