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Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Tables)
6 Months Ended
Jun. 30, 2018
SCHEDULE OF INCOME TAXES [Table Text Block]
    Three months ended June 30,     Six months ended June 30,  
    2017     2018     2017     2018  
PRC income tax:                        
         Current $   -   $   - $     -   $   -  
         Deferred   -     -     -     -  
  $   -   $   - $     -   $   -  
SCHEDULE OF INCOME TAX RECONCILIATION [Table Text Block]
    Three months ended June 30,     Six months ended June 30,  
    2017     2018     2017     2018  
Loss before income taxes $ (3,753,380 ) $ (3,445,688 ) $ (5,821,596 ) $ (6,013,521 )
United States federal corporate income tax rate   35%     21%     35%     21%  
Income tax credit computed at United States statutory corporate income tax rate   (1,313,683 )   (723,594 )   (2,037,559 )   (1,262,839 )
Reconciling items:                        
Rate differential for PRC earnings   344,337     (129,077 )   505,764     (215,856 )
Non-deductible expenses   25,245     30,964     95,768     97,050  
Share based payments   83,565     14,969     171,936     32,519  
Valuation allowance on deferred tax assets   860,536     806,738     1,264,091     1,349,126  
Income tax expenses $   -   $   -   $   -   $   -  
SCHEDULE OF DEFERRED TAX ASSETS AND LIABILITIES [Table Text Block]
    December 31,     June 30,  
    2017     2018  
Deferred tax assets            
Trade accounts receivable $ 1,098,183   $ 939,319  
Inventories   1,772,444     1,661,809  
Property, plant and equipment   781,227     882,078  
Provision for product warranty   569,958     566,292  
Net operating loss carried forward   25,892,299     27,449,376  
Valuation allowance   (30,114,111 )   (31,498,874 )
Deferred tax assets, non-current $   -   $   -  
             
Deferred tax liabilities, non-current $   -   $   -  
Schedule of Unrecognized Tax Benefits [Table Text Block]
      Gross UTB     Surcharge     Net UTB  
  Balance as of January 1, 2018 $ 7,537,273   $   -   $ 7,537,273  
  Decrease in unrecognized tax benefits taken in current period   (128,229 )   -     (128,229 )
  Balance as of June 30, 2018 $ 7,409,044   $   -   $ 7,409,044