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Income Taxes (Details 2) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Allowance for doubtful trade receivables $ 4,453,769 $ 4,552,432
Allowance for doubtful other receivables 8,721 10,002
Inventory obsolescence reserve 1,487,087 1,595,671
Expenses not deductible in current year 1,101,268 1,076,126
Advances for intangible assets impairment 5,628,803 4,387,237
PRC net operating loss carry forward 13,124,191 14,572,439
U.S. net operating loss carry forward 1,187,112 1,076,830
Total deferred income tax assets 26,990,951 27,270,737
Valuation allowance (26,990,951) (27,270,737)
Net deferred income tax asset
Deferred income tax liability:    
Intangible assets $ 764,374 $ 738,175