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Stock Option Plans - Virginia Partners Stock Option Plan Information (Details) - Virginia Partners Stock Option Plan - Stock options
3 Months Ended 12 Months Ended
Nov. 15, 2019
$ / shares
shares
Mar. 31, 2020
$ / shares
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2015
Dec. 31, 2019
$ / shares
Equity Compensation            
Vesting period (in years)     3 years 3 years    
Percentage of options vesting at the merger   100.00%        
Number of options converted | shares 149,200          
Exercise price of option converted | $ / shares $ 10.52          
Number of options outstanding after conversion | shares 256,294          
Exercise price of option outstanding | $ / shares $ 6.13 $ 6.16       $ 6.14
Conversion ratio, stock based compensation 1.7179          
Maximum            
Equity Compensation            
Contractual life         10 years