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15. QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Quarterly Financial Information Details                    
Revenue $ 3,797,000 $ 3,156,000 $ 2,851,000 $ 2,723,000 $ 3,215,000 $ 3,423,000 $ 2,861,000 $ 2,737,000 $ 12,527,268 $ 12,235,986
Gross profit 2,170,000 1,792,000 1,699,000 1,613,000 1,935,000 1,885,000 1,678,000 1,471,000 7,273,932 6,968,526
Income from operations 680,000 581,000 485,000 453,000 753,000 821,000 591,000 255,000 2,198,880 2,420,401
Net income from continuing operations 517,000 273,000 276,000 281,000 499,000 498,000 310,000 123,000 1,360,234 1,432,731
Net income (loss) from discontinued operations 12,000 (5,000) (57,000) (95,000) (213,000) (125,000) (138,000) (96,000) (157,385) (574,976)
Net income $ 530,000 $ 268,000 $ 220,000 $ 185,000 $ 286,000 $ 373,000 $ 172,000 $ 27,000 $ 1,202,849 $ 857,755
Basic net income per share $ 0.1 $ 0.06 $ 0.05 $ 0.04 $ 0.05 $ 0.08 $ 0.04 $ 0.01 $ 0.28 $ 0.29
Diluted net income per share $ 0.1 $ 0.06 $ 0.05 $ 0.04 $ 0.05 $ 0.08 $ 0.04 $ 0.01 $ 0.28 $ 0.29
Shares used in calculation of net income per share:                    
Basic 4,813,025 4,821,084 4,871,303 4,887,487 4,892,977 4,892,977 4,892,977 4,892,977 4,849,163 4,892,977
Diluted 4,822,361 4,828,038 4,877,145 4,891,725 4,896,968 4,896,865 4,897,150 4,898,236 4,855,756 4,896,968