XML 82 R60.htm IDEA: XBRL DOCUMENT v3.20.4
Note 13 - Income Taxes - Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income taxes computed at the federal statutory rate $ (1,762) $ 6,320 $ 5,289
State taxes, net of federal benefits (253) 945 970
Percentage depletion (714) (2,093) (1,033)
Changes in tax status (1,773)    
Change in valuation allowance     (4,464)
Change in enacted tax rates 473 109  
Other, net 545 (118) (649)
Total $ (3,484) $ 5,163 $ 113