Annual report pursuant to Section 13 and 15(d)

Note 8 - Income Taxes (Details Textual)

v3.19.1
Note 8 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 35.00% 35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability   $ (3,900)  
Increase (Decrease) in Transition Tax Liability   $ 3,400  
Current Income Tax Expense (Benefit), Nonqualified Withdrwal of Funds from Capital Construction Fund $ 1,400    
Effective Income Tax Rate Reconciliation, Percent, Total 14.50% 63.60% (33.40%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount   $ 4,500  
Interest Expense Suspended $ 7,300    
Interest Expense Suspended, Limitation Percentage 30.00%    
Operating Loss Carryforwards, Percentage of Taxable Income, Utilization Limitation 80.00%    
Operating Loss Carryforwards, Total $ 57,600 $ 42,200  
Operating Loss Carryforwards, Expiration Period   20 years  
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards, Valuation Allowance, Total $ 600 $ 600