7. Income Taxes (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0		$ 0		$ 0
Deferred tax asset	28,700		28,700
U.S. federal deferred tax assets	19,900		19,900
State deferred tax assets	8,800		8,800
Income tax expense	$ 1,508	$ 3,446	$ 4,409	$ 10,138
Effective income tax rate			32.00%	43.00%

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as noncurrent.

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