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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Cash flows from operating activities    
Net loss $ (1,957,482) $ (21,467,341)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 2,466,127 1,592,322
Provision for doubtful accounts 162,488 725,375
Write-down of inventories 160,469 5,776,891
Share-based compensation 221,180 759,293
Gain on disposal of property, plant and equipment (10,177)
Gain on disposal of patented proprietary technology (Note 7) (12,118,675)
Impairment charge 918,461 972,387
Exchange loss 80,546
Changes in operating assets and liabilities:    
Trade accounts and bills receivable 33,723,869 (53,553,988)
Inventories (475,664) 2,323,308
Prepayments and other receivables (739,871) (423,140)
Trade accounts and bills payable (9,760,687) 47,722,036
Accrued expenses and other payables and product warranty provisions 1,486,223 2,751,700
Trade receivable from and payables to former subsidiaries (5,349,699) 18,957,525
Net cash provided by operating activities 8,726,562 6,216,914
Cash flows from investing activities    
Proceeds on disposal of property, plant and equipment 31,594
Purchases of property, plant and equipment and construction in progress (7,359,041) (12,047,863)
Net cash used in investing activities (7,327,447) (12,047,863)
Cash flows from financing activities    
Advances from investors 2,071,282
Advances from former subsidiaries 2,367,179
Capital injection from non-controlling interests 26,823
Proceeds from bank borrowings 25,316,074
Repayment of bank borrowings (19,256,963) (1,479,487)
Borrowings from unrelated parties 6,055,838
Repayment of borrowings from unrelated parties (6,402,906)
Borrowings from related parties 17,903,224 18,964,063
Repayment to related parties (17,593,772) (17,407,191)
Repayment to former subsidiaries (2,367,179)
Proceeds from issuance of common stock (Note 1) 9,605,277
Net cash provided by financing activities 6,395,386 11,406,876
Effect of exchange rate changes on cash and cash equivalents and restricted cash (853,721) 485,929
Net increase in cash and cash equivalents and restricted cash 6,940,780 6,061,856
Cash and cash equivalents and restricted cash at the beginning of year 10,748,713 4,686,857
Cash and cash equivalents and restricted cash at the end of year 17,689,493 10,748,713
Non-cash transactions:    
Transfer of construction in progress to property, plant and equipment 8,617,337 15,637,965
Proceeds on disposal of patented proprietary technology offset against amount due to a former subsidiary (Note 7) 12,845,795
Interest, net of amounts capitalized $ 1,013,335 $ 95,903