5. Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefits beginning balance	$ 865	$ 0	$ 120
Increase in tax positions for prior years	25	865
Decreases in tax positions for prior years			(120)
Increase in tax positions for current year	0	0	0
Lapse in statutes of limitation	(397)	0	0
Gross unrecognized tax benefits ending balance	$ 493	$ 865	$ 0

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Amount of unrecognized tax benefits.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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