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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities    
Net income $ 3,125,551 $ 4,561,111
Adjustments to reconcile net income to net cash used in operating activities    
Stock-based compensation expense 144,453 0
Depreciation and amortization 450,518 365,336
Change in fair value of warrants liability (221,640) 318,109
(Recovery of) Provision for doubtful accounts 749,280 (18,311)
(Recovery of) Provision for inventory obsolescence 0 (5,756)
Gain on sale of equipment 0 (3,894)
Provision for warranty reserve 37,303 122,709
Deferred tax benefit (118,030) 0
Changes in assets and liabilities:    
Increase in accounts receivable (3,797,045) (2,202,475)
Increase in prepayments and other current assets (1,413,176) (3,609,438)
Decrease (Increase) in other receivables 642,287 (1,665,312)
Decrease (Increase) in inventories 842,052 (4,042,481)
Decrease (Increase) in tax receivable 2,630,467 (2,156,547)
Increase (Decrease) Increase in accounts payable 3,607 (64,452)
Increase in advances from customers 33,811 94,936
(Decrease) Increase in accrued expenses and other current liabilities 14,470 (5,811)
(Decrease) Increase in tax payable (6,285,660) 3,334,321
Net cash used in operating activities (3,161,752) (4,977,955)
Cash flows from investing activities    
Proceeds from sale of equipment 0 10,342
Capital expenditures and other additions (153,061) (887,541)
Advances to related parties (2,358) (1,503)
Net cash used in investing activities (155,419) (878,702)
Cash flows from financing activities    
Proceeds from bank loan 1,542,680 0
Repayment of bank loan (1,533,604) 0
Net proceeds from issuance of common stock 0 9,944,207
Net cash provided by financing activities 9,076 9,944,207
Effect of exchange rate fluctuations on cash and cash equivalents 1,079,195 684,115
Net increase (decrease) in cash and cash equivalents (2,228,900) 4,771,665
Cash and cash equivalents at beginning of year 5,923,386 1,151,721
Cash and cash equivalents at end of year 3,694,486 5,923,386
Supplemental cash flow information    
Income tax paid 1,906,763 24,813
Interest paid $ 82,136 $ 70,343