15. QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Details
Revenue	$ 4,445,000	$ 4,046,000	$ 3,693,000	$ 2,972,000	$ 3,577,000	$ 3,044,000	$ 3,609,000	$ 3,042,000	$ 15,156,159	$ 13,271,914
GROSS PROFIT	2,554,000	2,500,000	2,241,000	1,722,000	2,023,000	1,759,000	2,144,000	1,757,000	9,016,606	7,683,475
Income from operations	824,000	973,000	760,000	249,000	612,000	419,000	855,000	489,000	2,806,222	2,374,544
Net income	$ 865,000	$ 574,000	$ 547,000	$ 175,000	$ 373,000	$ 232,000	$ 521,000	$ 297,000	$ 2,161,340	$ 1,423,492
Basic net income per share	$ 0.18	$ 0.12	$ 0.11	$ 0.04	$ 0.08	$ 0.05	$ 0.11	$ 0.06	$ 0.45	$ 0.3
Diluted net income per share	$ 0.18	$ 0.12	$ 0.11	$ 0.04	$ 0.07	$ 0.05	$ 0.11	$ 0.06	$ 0.44	$ 0.29
Shares used in calculation of net income per share:
Basic	4,863,468	4,847,765	4,847,188	4,839,149	4,826,237	4,791,972	4,796,926	4,800,008	4,849,614	4,804,801
Diluted	4,939,777	4,930,860	4,933,550	4,939,412	4,877,757	4,849,225	4,842,081	4,832,204	4,930,494	4,856,321