Annual report pursuant to Section 13 and 15(d)

Income taxes (Reconciliation of Income Taxes) (Details)

v3.20.1
Income taxes (Reconciliation of Income Taxes) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Statutory federal income tax expense (benefit) $ (4,293) $ (12,791)
State taxes, net of federal tax expense (benefit) (664) (2,887)
Stock compensation 1,142 174
Other 195
Change in valuation allowance 3,477 14,805
Income taxes benefit $ (143) $ (699)