CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
NET REVENUE	$ 218,229,539	$ 169,086,267
Cost of sales	(197,174,187)	(150,451,275)
GROSS PROFIT	21,055,352	18,634,992
Selling expenses	(680,680)	(686,006)
General and administrative expenses	(2,405,784)	(2,097,834)
Income from operations	17,968,888	15,851,152
Other income (expenses):
Interest income	170,751	163,136
Gain on extinguishment of warrant liabilities	0	73,291
Change in fair value of warrants	(108,000)	(430,000)
Other income (expenses)	(5,764)	94,779
Total other income (expenses)	56,987	(98,794)
Income before income taxes	18,025,875	15,752,358
Provision for income taxes	(4,714,688)	(4,277,346)
NET INCOME	13,311,187	11,475,012
OTHER COMPREHENSIVE INCOME:
Foreign currency translation adjustments	761,707	208,402
COMPREHENSIVE INCOME	$ 14,072,894	$ 11,683,414
Net income per share
Basic	$ 0.45	$ 0.39
Diluted	$ 0.44	$ 0.38
Weighted average number of shares outstanding
Basic	29,820,836	29,800,624
Diluted	29,951,416	30,080,154