Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Income Taxes (Details Textual)

v3.8.0.1
Note 11 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards, Valuation Allowance, Total $ 0 $ 0
Percentage of Valuation Allowance 100.00%  
Unrecognized Tax Benefits, Ending Balance $ 0 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total $ 0 $ 0
Earliest Tax Year [Member]    
Open Tax Year 2014  
Latest Tax Year [Member]    
Open Tax Year 2017