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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Cash flows from operating activities    
Net loss $ (3,312,215) $ (3,445,375)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 69,177 1,001,459
Depreciation and amortization 414,224 290,667
(Gain) Loss on disposal of equipment (15,247) 122,122
Provision for doubtful accounts 43,873 33,621
Change in warranty obligation (3,881) (12,073)
Provision for inventory obsolescence 114 61,253
Change in fair value of warrants liability 99,820 110,021
Unrealized loss on securities 678,304
Changes in assets and liabilities:    
Decrease (Increase) in accounts receivable 42,873 (18,773)
Decrease in advances to suppliers 4,721 348,539
Increase in other receivables and prepayments, net - related party (61,363)
Decrease in other receivables and prepayments, net - third parties 184,296 51,824
Increase in interest receivables - related party (1,023)
Decrease (Increase) in inventories 231,644 (1,068,701)
Increase in operating lease right-of-use assets, net (59,260)
Decrease (Increase) in other taxes receivable 21,642 (115,254)
Increase in accounts payable 27,010 504,582
Increase in interest payable – related party 8,908
Increase in operating lease liabilities, current 44,268
Increase (Decrease) in advances from customers 65,999 (79,033)
Increase (Decrease) in accrued expenses and other current liabilities 412,154 (178,044)
Net cash used in operating activities (1,042,599) (2,454,528)
Cash flows from investing activities    
Proceeds from disposal of equipment 16,302
Capital expenditures and other additions (16,127)
Loan to a related party (85,000) (6,000,000)
Repayment from a related party 145,592
Net cash used in investing activities (68,698) (5,870,535)
Cash flows from financing activities    
Loans from related parties 818,500 2,749,250
Net proceeds from issuance of common stock 18,601
Net cash provided by financing activities 818,500 2,767,851
Effect of exchange rate fluctuations on cash and cash equivalents (130,964) (178,370)
Net decrease in cash and cash equivalents (423,761) (5,735,582)
Cash and cash equivalents at beginning of period 477,309 6,809,485
Cash and cash eqivalents at end of period 53,548 1,073,903
Supplemental cash flow information    
Income tax paid
Interest paid 17,991
Non-cash investing and financing activities:    
Offset short-term borrowings - related party against loans to a related party (including accrued interests) $ 86,023