4. Earnings Per Share (Details-EPS calculation) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income	$ 6,089	$ 1,919	$ 5,414	$ 2,004
Weighted average shares used to compute net income per share
Basic	14,936,442	14,785,437	14,890,581	13,794,384
Effective of dilutive options and warrants	936,000	857,000	1,124,000	827,000
Diluted	15,871,745	15,641,694	16,015,158	14,620,570
Net income per share
Basic	$ .41	$ .13	$ .36	$ .15
Diluted	$ .38	$ .12	$ .34	$ .14