Consolidated Statements of Income and Comprehensive Income (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
SALES	$ 279,633,212	$ 215,779,014
COST OF SALES	214,577,277	171,234,899
GROSS PROFIT	65,055,935	44,544,115
OPERATING EXPENSES
Selling expenses	33,723,088	18,145,937
General and administrative expenses	16,248,947	14,344,606
Total operating expenses	49,972,035	32,490,543
INCOME FROM OPERATIONS	15,083,900	12,053,572
OTHER INCOME (EXPENSE)
Interest income	1,348,646	703,039
Interest expense	(2,103,103)	(1,446,192)
Change in fair value of derivative liability	96,800	216,000
Other income	284,310	160,830
Total other income(expense)	(373,347)	(366,323)
INCOME BEFORE INCOME TAX EXPENSE	14,710,553	11,687,249
INCOME TAX EXPENSE	(1,907,611)	(2,040,246)
NET INCOME	12,802,942	9,647,004
Foreign currency translation gain	385,284	1,327,093
COMPREHENSIVE INCOME	$ 13,188,226	$ 10,974,096
EARNINGS PER SHARE:
Basic and diluted	$ 0.87	$ 0.65
Weighted average number of shares outstanding
Basic and diluted	14,767,253	14,757,319