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15. QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Quarterly Financial Information Details                    
Revenue $ 3,577,000 $ 3,044,000 $ 3,609,000 $ 3,042,000 $ 3,797,000 $ 3,156,000 $ 2,851,000 $ 2,723,000 $ 13,271,914 $ 12,527,268
GROSS PROFIT 2,023,000 1,759,000 2,144,000 1,757,000 2,170,000 1,792,000 1,699,000 1,613,000 7,683,475 7,273,932
Income from operations 612,000 419,000 855,000 489,000 680,000 581,000 485,000 453,000 2,374,544 2,198,880
Net income from continuing operations 373,000 232,000 521,000 297,000 536,000 273,000 276,000 275,000 1,423,492 1,360,234
Net income (loss) from discontinued operations 0 0 0 0 (5,000) (5,000) (57,000) (90,000) 0 (157,385)
Net income $ 373,000 $ 232,000 $ 521,000 $ 297,000 $ 530,000 $ 268,000 $ 220,000 $ 185,000 $ 1,423,492 $ 1,202,849
Basic net income per share $ 0.08 $ 0.05 $ 0.11 $ 0.06 $ 0.1 $ 0.06 $ 0.05 $ 0.04 $ 0.3 $ 0.28
Diluted net income per share $ 0.07 $ 0.05 $ 0.11 $ 0.06 $ 0.1 $ 0.06 $ 0.05 $ 0.04 $ 0.29 $ 0.28
Shares used in calculation of net income per share:                    
Basic 4,826,237 4,791,972 4,796,926 4,800,008 4,813,025 4,821,084 4,871,303 4,887,487 4,804,801 4,849,163
Diluted 4,877,757 4,849,225 4,842,081 4,832,204 4,822,361 4,828,038 4,877,145 4,891,725 4,856,321 4,855,756