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Note 4 - Subsidiaries and Joint Ventures With Noncontrolling Owners' Interests (Tables) | 6 Months Ended
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Jun. 30, 2017
Notes Tables |
Schedule of Components of Agreement Obligation [Table Text Block] |
|  | June 30, 2017 |  | December 31, 2016
Members’ interest subject to mandatory redemption |  | $ | 40,000 |  |  | $ | 40,000 |
Net accumulated earnings |  |  | 6,346 |  |  |  | 5,230 |
Total liability |  | $ | 46,346 |  |  | $ | 45,230 |
Schedule of Changes in Noncontrolling Interests and Joint Ventures [Table Text Block] |
|  | Six Months Ended June 30,
|  | 2017 |  | 2016
Balance, beginning of period |  | $ | 656 |  |  | $ | (91 | )
Net income attributable to noncontrolling interest included in equity |  |  | 1,272 |  |  |  | 512 |
Distributions to noncontrolling interest owners |  |  | - |  |  |  | - |
Balance, end of period |  | $ | 1,928 |  |  | $ | (421 | )

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