Annual report pursuant to Section 13 and 15(d)

Employee benefit plans (Details)

v3.20.1
Employee benefit plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Employee Benefit Plans [Abstract]    
Contributions related to plan and recognized expense $ 100 $ 0
Maximum [Member]    
Employee Benefit Plans [Abstract]    
Percentage of 100% participant contributions matched 3.00%  
Percentage of 50% participant contributions matched 5.00%