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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash flows from operating activities |  |  |
Net income | $ 2,003,326 | $ 3,216,352 | $ 3,125,551
Adjustments to reconcile net income to net cash (used in) provided by operating activities |  |  |
Stock-based compensation expense | 239,871 | 314,479 | 144,453
Depreciation and amortization | 619,890 | 552,086 | 450,518
Loss on disposal of equipment | 473,709 | 0 | 0
Change in fair value of warrants liability | 346,691 | 180,192 | (221,640)
Change in deferred tax assets | (2,698) | 0 | 0
Provision (Recovery of) for doubtful accounts | 44,041 | (3,939) | 749,280
Provision for doubtful accounts - other receivables | 0 | 598,747 | 0
Provision for warranty reserve | 0 | 0 | 37,303
Deferred tax benefit | 0 | 0 | (118,030)
Changes in assets and liabilities: |  |  |
(Increase) Decrease in accounts receivable | (345,443) | 344,341 | (3,797,045)
Increase in prepayments and other current assets | (3,844,093) | (1,730,704) | (1,413,176)
Decrease (Increase) in other receivables | 562,140 | (1,617,781) | 642,287
(Increase) Decrease in inventories | (120,996) | 931,844 | 842,052
(Increase) Decrease in tax receivable | (34,569) | 563,816 | 2,630,467
Increase in accounts payable | 47,315 | 4,271 | 3,607
Increase (Decrease) in advances from customers | 60,758 | (56,965) | 33,811
Increase in accrued expenses and other current liabilities | 75,072 | 52,482 | 14,470
Decrease in taxes payable | (325,464) | (1,644,345) | (6,285,660)
Net cash (used in) provided by operating activities | (200,450) | 1,704,876 | (3,161,752)
Cash flows from investing activities |  |  |
Capital expenditures and other additions | (1,130,621) | (11,054) | (153,061)
Software Copyrights | 0 | (2,715,453) | 0
Advances to related parties | 0 | 0 | (2,358)
Net cash used in investing activities | (1,130,621) | (2,726,507) | (155,419)
Cash flows from financing activities |  |  |
Proceeds from bank loan | 2,503,747 | 2,373,145 | 1,542,680
Repayment of bank loan | (2,502,457) | (1,580,436) | (1,533,604)
Capital contributed by noncontrolling interest | 329,576 | 0 | 0
Net cash provided by financing activities | 330,866 | 792,709 | 9,076
Effect of exchange rate fluctuations on cash and cash equivalents | 87,820 | 39,766 | 1,079,195
Net decrease in cash and cash equivalents | (912,385) | (189,156) | (2,228,900)
Cash and cash equivalents at beginning of year | 3,505,330 | 3,694,486 | 5,923,386
Cash and cash equivalents at end of year | 2,592,945 | 3,505,330 | 3,694,486
Supplemental cash flow information |  |  |
Income tax paid | 688,219 | 1,416,958 | 1,906,763
Interest paid | 159,482 | 149,488 | 82,136
Uncollected option exercise proceeds recorded as other receivable | $ 11,600 | $ 0 | $ 0

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