16. EARNINGS PER SHARE (Detail) - Schedule of earnings per share, basic and diluted (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, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (in Dollars)	$ 176,787	$ 490,452	$ 551,670	$ (76,109)	$ 699,469	$ 541,000	$ (21,372)	$ 301,577	$ 1,284,616	$ 782,295	$ 586,738	$ 333,743	$ 1,142,800	$ 1,520,674	$ 2,987,392
Shares used in calculation of income per share:
Basic													4,802,569	4,619,542	4,573,810
Effect of dilutive options													86,858	301,752	421,331
Diluted													4,889,427	4,921,294	4,995,141
Net income per share:
Basic (in Dollars per share)	$ 0.04	$ 0.10	$ 0.12	$ (0.02)	$ 0.15	$ 0.12	$ 0.00	$ 0.07	$ 0.28	$ 0.17	$ 0.13	$ 0.07	$ 0.24	$ 0.33	$ 0.65
Diluted (in Dollars per share)	$ 0.04	$ 0.10	$ 0.11	$ (0.02)	$ 0.14	$ 0.11	$ 0.00	$ 0.06	$ 0.26	$ 0.16	$ 0.12	$ 0.07	$ 0.23	$ 0.31	$ 0.60