Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Impairment of Deferred Development Costs | $ 0 | $ 0 |
Asset Impairment Charges | $ 0 | $ 0 |
Minimum [Member] | ||
Property, Plant and Equipment, Useful Life | 3 years | |
Maximum [Member] | ||
Property, Plant and Equipment, Useful Life | 40 years |