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Note 12 - Income Taxes and Deferred Tax Asset/Liability - Summary Reconciliation Reported Amount of Income Tax Expense (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Tax benefit at the U.S. federal statutory rate $ (2,563) $ (6,013) $ (1,608)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 35.00% 35.00% 35.00%
State tax based on income, net of refunds and federal benefits $ (113) $ (860) $ (155)
State tax based on income, net of refunds and federal benefits 1.50% 5.00% 3.40%
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling interests owners $ (3,786) $ (2,620) $ (2,365)
Taxes on subsidiaries’ and joint ventures’ earnings allocated to noncontrolling interests owners 51.70% 15.30% 51.50%
Valuation allowance $ 6,919 $ 10,036 $ 4,152
Valuation allowance (94.50%) (58.40%) (90.40%)
Tax credits $ (1,258) $ (551)
Tax credits 17.20% 3.20%
Reduction of tax receivable $ 524
Reduction of tax receivable (11.40%)
Return to provision $ 400
Return to provision (5.50%)
Earn-out liability $ 433
Earn-out liability (5.90%)
Other permanent differences $ 56 $ 15 $ 84
Other permanent differences (0.80%) (0.10%) (1.90%)
Income tax expense $ 88 $ 7 $ 632
Income tax expense (1.30%) (13.80%)