CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
NET REVENUE	$ 245,804,613	$ 191,007,886	$ 464,034,152	$ 360,094,153
Cost of sales	(222,034,732)	(170,296,852)	(419,208,919)	(320,748,127)
GROSS PROFIT	23,769,881	20,711,034	44,825,233	39,346,026
Selling expenses	(801,861)	(740,988)	(1,482,541)	(1,426,994)
General and administrative expenses	(2,006,127)	(1,834,465)	(4,411,911)	(3,932,299)
Income from operations	20,961,893	18,135,581	38,930,781	33,986,733
Other income (expenses):
Interest income	154,254	204,694	325,005	367,830
Gain on extinguishment of warrant liabilities	3,520	0	3,520	73,291
Change in fair value of warrants	73,000	(44,000)	(35,000)	(474,000)
Other income	40,628	0	34,864	94,779
Total other income	271,402	160,694	328,389	61,900
Income before income taxes	21,233,295	18,296,275	39,259,170	34,048,633
Provision for income taxes	(5,557,485)	(4,849,609)	(10,272,173)	(9,126,955)
NET INCOME	15,675,810	13,446,666	28,986,997	24,921,678
OTHER COMPREHENSIVE INCOME:
Foreign currency translation adjustments	4,364,921	(1,210,053)	5,126,628	(1,001,651)
COMPREHENSIVE INCOME	$ 20,040,731	$ 12,236,613	$ 34,113,625	$ 23,920,027
Net income per share
Basic	$ 0.53	$ 0.45	$ 0.97	$ 0.84
Diluted	$ 0.52	$ 0.45	$ 0.97	$ 0.83
Weighted average number of shares outstanding
Basic	29,825,336	29,820,836	29,823,098	29,810,996
Diluted	29,993,580	30,017,985	29,972,614	30,049,336