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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.

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible charitable contribution carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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