Annual report pursuant to Section 13 and 15(d)

Operating leases, Assets and liabilities (Details)

v3.20.1
Operating leases, Assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Assets [Abstract]    
OperatingLeaseRightOfUseAsset $ 951 $ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseRightOfUseAsset  
Current-Operating [Abstract]    
Operating lease liability short term $ 345 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseLiabilityCurrent  
Noncurrent-Operating [Abstract]    
OperatingLeaseLiabilityNoncurrent $ 641 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OperatingLeaseLiabilityNoncurrent  
Total operating lease costs $ 986  
ASU 842 [Member]    
Assets [Abstract]    
OperatingLeaseRightOfUseAsset   421
Current-Operating [Abstract]    
Operating lease liability short term   87
Noncurrent-Operating [Abstract]    
OperatingLeaseLiabilityNoncurrent   342
Total operating lease costs   $ 429