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1. Summary of Significant Accounting Policies (Details - Earnings Per Share) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Numerator for basic and diluted earnings per share	$ 14,862	$ 3,765	$ 29,300
Denominator for basic earnings per share - weighted average number of common shares outstanding during the year	21,989	22,687	24,356
Incremental common shares attibutable to exercise of outstanding options and warrants	2,999	4,527	4,679
Denominator for diluted earnings per share	24,988	27,214	29,035
Basic earnings per share	$ 0.68	$ 0.17	$ 1.20
Diluted earnings per share	$ 0.59	$ 0.14	$ 1.01

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