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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Cash flows from operating activities    
Net income $ 1,517,063 $ 1,808,923
Adjustments to reconcile net income to net cash (used in) operating activities    
Stock-based compensation expense 43,737 124,077
Depreciation and amortization 300,840 246,448
Change in fair value of warrants liability 4,413 92,067
Provision for doubtful accounts 27,224 27,942
Changes in assets and liabilities:    
(Increase) in accounts receivable (812,221) (282,688)
(Increase) in prepayments and other current assets (3,268,571) (522,831)
Decrease (Increase) in other receivables 215,084 (1,670,623)
Decrease (Increase) in inventories (18,953) 733,009
Decrease (Increase) in tax receivable (3,839) 384,599
Increase in accounts payable 840 6,115
Decrease (Increase) in advances from customers 95,181 (65,347)
Decrease (Increase) in accrued expenses and other current liabilities 285,657 (31,931)
Decrease (Increase) in taxes payable 538,466 (1,616,959)
Net cash (used in) operating activities (1,075,079) (767,199)
Cash flows from investing activities    
Capital expenditures and other additions (1,115,276) (2,405,707)
Net cash used in investing activities (1,115,276) (2,405,707)
Cash flows from financing activities    
Proceeds from bank loan 2,413,250 2,373,145
Repayment of bank loan (2,410,176) (1,580,436)
Net cash provided by financing activities 3,074 792,709
Effect of exchange rate fluctuations on cash and cash equivalents 25,197 (206,347)
Net decrease in cash and cash equivalents (2,162,084) (2,586,544)
Cash and cash equivalents at beginning of period 3,505,330 3,694,486
Cash and cash equivalents at end of period 1,343,246 1,107,942
Supplemental cash flow information    
Income tax paid 231,371 779,678
Interest paid $ 76,187 $ 64,904