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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash flows from operating activities      
Net loss $ (10,250,795) $ (10,362,335) $ (25,033,872)
Net loss from discontinued operations (251,153) (3,663,465) (26,003,708)
Net income (loss) from continuing operations (9,999,642) (6,698,870) 969,836
Adjustments to reconcile net loss to net cash used in operating activities:      
Stock-based compensation 947,481 1,055,744 1,408,422
Depreciation and amortization 1,232,263 525,916 174,962
Depreciation from prepaid expenses 23,372 0 0
Loss from disposal of inventories 202,297 0 0
Loss from warrant redemption 1,091,719 0 0
Loss on disposal of equipment and intangible assets 18,241 0 0
Change in fair value of warrants liability (137,710) (390,324) (2,866,171)
Change in deferred tax assets 0 0 125,676
Provision for doubtful accounts(recovery gain from doubtful accounts) - accounts receivable (139,716) 10,014 35,900
Provision for doubtful accounts (recovery gain from doubtful accounts) - other receivables (41,790) (1,899) 27,200
Provision for doubtful accounts (recovery gain from doubtful accounts) - advances to suppliers-third parties (1,095) 429 326,098
Change in warranty reserve 141,449 (120,105) (209,227)
Provision for inventory obsolescence 2,450,213 16,203 106,199
Changes in assets and liabilities:      
Decrease in accounts receivable 115,854 32,700 1,695,850
Decrease in advances to suppliers-third parties 352,956 1,011,843 3,752,091
Decrease (Increase) in advance to supplier- related party 875,044 623,583 (1,498,627)
Decrease (Increase) in other receivables 13,272 1,588,626 (437,005)
Decrease (Increase) in inventories 1,185,688 41,816 (3,713,655)
Decrease in taxes receivable 0 0 95,094
Decrease (Increase) in long-term prepaid expenses 266,664 (148,386) (141,650)
Increase (Decrease) in accounts payable 51,579 (24,913) (41,019)
Increase (Decrease) in due to related parties 107,715 (40,335) (108)
Increase (Decrease) in advances from customers 63,541 (18,463) (256,504)
Increase (Decrease) in accrued expenses and other current liabilities (1,315,779) 1,336,906 (38,940)
Increase (Decrease) in taxes payable (113,429) (12,178) 45,068
Net cash used in operating activities from continuing operations (2,609,813) (1,211,693) (440,510)
Net cash provided by (used in) operating activities from discontinued operations (146,898) (1,133,122) 4,577,863
Net cash provided by (used in) operating activities (2,756,711) (2,344,815) 4,137,353
Cash flows from investing activities      
Capital expenditures and other additions (636,130) (27,477) (2,053,039)
Loan to related party (2,000,000) 0 0
Repayment from related party 2,002,110 0 0
Purchases of intangible assets 0 0 (3,353,353)
Net cash used in investing activities from continuing operations (634,020) (27,477) (5,406,392)
Net cash used in investing activities from discontinued operations (18,447) (384) (5,791,256)
Net cash used in investing activities (652,467) (27,861) (11,197,648)
Cash flows from financing activities      
Proceeds from related party loans 733,688 4,052,319 0
Repayments of related party loans (2,858,748) (1,788,050) 0
Proceeds from bank loans 0 4,008,975 2,944,000
Repayments of bank loans (1,505,000) (4,810,770) (2,948,700)
Net proceeds from option exercises 10,150 36,250 194,300
Payment of warrant redemption (1,116,744) 0 0
Net proceeds from issuance of common stock 18,412,462 0 6,066,546
Net cash provided by financing activities from continuing operations 13,675,808 1,498,724 6,256,146
Net cash provided by financing activities from discontinued operations 0 0 0
Net cash provided by financing activities 13,675,808 1,498,724 6,256,146
Effect of exchange rate fluctuations on cash and cash equivalents (98,531) (229,087) (61,033)
Net increase (decrease) in cash and cash equivalents 10,168,099 (1,103,039) (865,182)
Cash and cash equivalents at beginning of year 624,724 1,727,763 2,592,945
Cash and cash equivalents at end of year 10,792,823 624,724 1,727,763
-less cash and cash equivalents at end of year from discontinued operations 0 (9,207) (88,017)
Cash and cash equivalents at end of year from continuing operations 10,792,823 615,517 1,639,746
Supplemental cash flow information      
Income tax paid 0 0 188,695
Interest paid $ 128,537 $ 196,220 $ 176,231