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Note 21 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred tax assets:    
Net operating losses (1) [1] $ 22,137 $ 44,833
Tax credit carryforwards (2) [2] 6,064 5,368
Capital loss carryforwards 4,648 3,659
Related party deferred losses 619 952
Charitable contribution carryforwards 23 35
Total deferred tax assets 15,175 23,401
Net deferred tax assets 2,436 3,243
Domestic Tax Authority [Member]    
Deferred tax assets:    
Tax/GAAP basis differences 35,839 63,167
Valuation allowance (54,155) (95,126)
Deferred tax liabilities (12,739) (19,599)
Foreign Tax Authority [Member]    
Deferred tax assets:    
Tax/GAAP basis differences 513
Deferred tax liabilities $ (559)
[1] Expiration dates ranging from 2021 to 2032.
[2] Expiration dates ranging from 2027 to 2035 and includes alternative minimum tax credit carryovers of $3.5 million that do not expire.