Note 5 - Marketable Securities - Marketable Securities (Details) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
---|---|---|
Adjusted Cost | $ 4,576 | $ 4,849 |
Unrealized Gains | 193 | 272 |
Unrealized Losses | (9) | |
Fair Value | 4,760 | 5,121 |
Corporate Debt Securities [Member] | ||
Adjusted Cost | 1,429 | 1,702 |
Unrealized Gains | 96 | 158 |
Unrealized Losses | (9) | |
Fair Value | 1,516 | 1,860 |
Trust Preferred Securities [Member] | ||
Adjusted Cost | 3,147 | 3,147 |
Unrealized Gains | 97 | 114 |
Unrealized Losses | ||
Fair Value | $ 3,244 | $ 3,261 |