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9. Income Taxes (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Net deferred tax asset | $ 19,200 |  |
Unrecognized tax benefits | 0 |  |
Income tax expense | 3,841 | $ 28,306 | $ 20,361
Operating Income (Loss) [Member] |  |  |
Net deferred tax asset | 12,400 |  |
Federal [Member] |  |  |
Net deferred tax asset | 13,900 |  |
State [Member] |  |  |
Net deferred tax asset | 5,300 |  |
Net operating loss carryforwards | $ 35,700 |  |
Net operating losses expire | Dec. 31, 2019 |  |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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