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Stock-based Compensation, Summary (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Stock-based Compensation [Abstract]    
Stock-based compensation expense $ 368 $ 662
2016 Omnibus Incentive Plan [Member]    
Stock-based Compensation [Abstract]    
Common stock reserved for future issuance (in shares) 7,832,651  
Number of shares available for issuance (in shares) 3,412,029