Commitments and contingencies

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

24. Commitments and contingencies

Operating leases commitments

The Company leases factory and office premises under various non-cancelable operating lease agreements that expire at various dates through years 2019 to 2022 with an option to renew the lease. All leases are on a fixed payment basis. None of the leases include contingent rentals. Minimum future commitments under these agreements as of December 31, 2018 are as follows:

For the years ending December 31,	$
2019		2,288,437
2020		1,790,861
2021		1,621,298
2022		668,792
		6,369,388

Rent expenses for the years ended December 31, 2018 and 2017 were $2,908,175 and $2,540,031, respectively.

Capital commitment

The Company has entered into agreements with an independent third party for construction of a plant and two dormitories. As of December 31, 2018, the Company had non-cancellable construction commitment of $10,971,456.