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Notes payable | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Short-term Debt [Text Block] | (9) Notes payable Notes payable was nil as of December 31, 2019. As of December 31, 2018, the Company had bank acceptance notes of $3,642,616 from the Bank of Cangzhou to one of its major suppliers for settling purchase of raw materials. The acceptance notes are used to essentially extend the payment of accounts payable and are issued under the banking facilities obtained from bank as well as the restricted bank deposit of $3,642,616 in the bank as mentioned in Note (3). The bank acceptance notes from the bank bore interest rate at nil% per annum and 0.05% of notes amount as handling charge. The acceptance notes were due and paid off in January 2019.

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- Definition The entire disclosure for short-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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