EARNINGS (LOSS) PER SHARE - Summary of loss allocable to the common shareholders (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Numerator:
Net income (loss)	$ 218,149	$ (705,030)
Numerator for basic and diluted	$ 218,149	$ (705,030)
Denominator:
Weighted-average number of common shares outstanding (in shares)	184,663,869	179,831,987
Earnings per share, basic and diluted (in dollars per share)	$ 0.001	$ (0.004)