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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities      
Net income (loss) $ (10,362,335) $ (25,033,872) $ 2,003,326
Net income (loss) from discontinued operations (3,500,112) (25,956,512) 2,900,748
Net income (loss) from continuing operations (6,862,223) 922,640 (897,422)
Adjustments to reconcile net income to net cash (used in) provided by operating activities      
Stock-based compensation expense 1,055,744 1,408,421 239,871
Depreciation and amortization 619,207 269,595 216,369
Change in fair value of warrants liability (390,324) (2,866,171) 346,691
Change in deferred tax assets 0 125,676 (2,698)
Provision for accounts receivable 10,014 35,900 0
Provision (benefit) for other receivables (1,899) 27,200 0
Provision for advances to suppliers - third parties 429 326,098 0
Change in warranty reserve (120,105) (209,227) 0
Provision for inventory obsolescence 16,203 142,207 0
Changes in assets and liabilities:      
(Increase) Decrease in accounts receivable (487,197) 1,743,792 2,366,023
Decrease (Increase) in advances to suppliers - third parties 1,005,042 3,751,434
Decrease (Increase) in advance to supplier - related party 623,583 (1,498,627) (4,004,830)
Decrease (Increase) in other receivables 1,605,521 (443,285) 2,265,617
Decrease (Increase) in inventories 92,020 (3,676,810) (171,634)
Decrease (Increase) in taxes receivable 0 372,935 (34,569)
Increase in long-term prepaid expenses (166,548) (142,377)  
Increase (Decrease) in accounts payable 208,457 (19,710) 72,791
(Decrease) Increase in advances from customers (18,463) (256,504) 278,300
Increase (Decrease) in accrued expenses and other current liabilities 1,337,741 (33,961) 85,926
(Decrease) Increase in taxes payable (20,702) 52,064 (325,464)
Net cash (used in) provided by operating activities from continuing operations (1,493,500) 31,290 434,971
Net cash (used in) provided by operating activities from discontinued operations (851,315) 4,106,063 (635,421)
Net cash (used in) provided by operating activities (2,344,815) 4,137,353 (200,450)
Cash flows from investing activities      
Capital expenditures and other additions (27,861) (2,053,039) (8,536)
Purchases of intangible assets 0 (3,353,353) 0
Net cash used in investing activities from continuing operations (27,861) (5,406,392) (8,536)
Net cash used in investing activities from discontinued operations 0 (5,791,256) (1,122,085)
Net cash used in investing activities (27,861) (11,197,648) (1,130,621)
Cash flows from financing activities      
Proceeds from related party 3,867,859 0 0
Repayment of the loan from related party (1,603,590) 0 0
Proceeds from bank loan 4,008,975 2,944,000 2,503,747
Repayments of bank loan (4,810,770) (2,948,700) (2,502,457)
Capital contributed by non-controlling interest 0 0 329,576
Net proceeds from option exercises 36,250 194,300 0
Net proceeds from issuance of common stock 0 6,066,546 0
Net cash provided by financing activities 1,498,724 6,256,146 330,866
Effect of exchange rate fluctuations on cash and cash equivalents (229,087) (61,033) 87,820
Net decrease in cash and cash equivalents (1,103,039) (865,182) (912,385)
Cash and cash equivalents at beginning of year 1,727,763 2,592,945 3,505,330
Cash and cash equivalents at end of year 624,724 1,727,763 2,592,945
Supplemental cash flow information      
Income tax paid 0 188,695 688,219
Interest paid 196,220 176,231 159,482
Uncollected option exercise proceeds recorded as other receivable $ 0 $ 0 $ 11,600