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Condensed consolidated statements of cash flows - USD ($)
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities    
Net loss $ (5,821,596) $ (4,571,799)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization 631,781 542,606
Provision for doubtful debts 380,808 585,968
Write-down of inventories 998,403 213,293
Share-based compensation 491,247 698,100
Deferred tax assets 0 (57,292)
Exchange loss (gain) (63,014) 22,855
Changes in operating assets and liabilities:    
Trade accounts and bills receivable (7,898,896) (1,347,959)
Inventories (252,756) (6,987,353)
Prepayments and other receivables (34,144) (2,125,822)
Trade accounts and bills payable 3,093,339 6,182,378
Accrued expenses and other payables 969,912 938,017
Income taxes payable (608,922) (462,429)
Trade receivable from and payables to former subsidiaries 4,629,774 7,768,021
Net cash provided by (used in) operating activities (3,484,064) 1,398,584
Cash flows from investing activities    
Increase (Decrease) in pledged deposits (241,343) 600,158
Purchases of property, plant and equipment and construction in progress (6,808,832) (7,618,814)
Net cash used in investing activities (7,050,175) (7,018,656)
Cash flows from financing activities    
Advances from investors 2,036,275 0
Proceeds from bank borrowings 0 13,024,446
Repayment of bank borrowings 0 (11,629,181)
Borrowings from unrelated parties 4,363,446 6,411,182
Repayment of borrowings from unrelated parties (4,746,539) (77,068)
Borrowings from related parties 1,873,373 1,088,196
Repayment of borrowings from related parties (1,047,227) 0
Proceeds from issuance of common stock 9,605,277 0
Net cash provided by financing activities 12,084,605 8,817,575
Effect of exchange rate changes on cash and cash equivalents 9,885 (152,766)
Net increase in cash and cash equivalents 1,560,251 3,044,737
Cash and cash equivalents at the beginning of period 408,713 80,711
Cash and cash equivalents at the end of period 1,968,964 3,125,448
Non-cash transactions:    
Transfer of construction in progress to property, plant and equipment 1,880,081 333,272
Cash paid during the period for:    
Income taxes 608,922 462,429
Interest, net of amounts capitalized $ 0 $ 0