C. Earnings Per Share (Details-Calculation EPS) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income (loss)	$ 2,679	$ 2,700	$ 6,089	$ (675)	$ 702	$ 1,577	$ 1,919	$ 85	$ 10,793	$ 4,283	$ (1,406)
Weighted average shares used to compute net income (loss) per share
Basic									15,626,753	14,307,477	9,964,955
Effective of dilutive options and warrants									906,000	880,000	0
Diluted									16,532,850	15,186,961	9,964,955
Net income (loss) per share
Basic	$ .16	$ .17	$ .41	$ (.05)	$ 0.05	$ 0.11	$ 0.13	$ 0.01	$ 0.69	$ 0.30	$ (.14)
Diluted	$ .15	$ .16	$ .38	$ (.05)	$ 0.05	$ 0.10	$ 0.12	$ 0.01	$ .65	$ 0.28	$ (.14)