Lease commitment (Details) - USD ($)	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Leases [Abstract]
Lease term description	The Company had a land, facilities and factory lease agreement with a 5-year lease term starting in April 2018 until April 2023. Upon adoption of ASU 2016-02, the Company recognized lease liabilities of approximately $0.82 million, with corresponding Right-of-Use (ROU) assets of the same amount based on the present value of the future minimum rental payments of the new lease, using an effective interest rate of 4.75%, which is determined using an incremental borrowing rate.
Weighted average remaining lease term	9 months 29 days
Rent expenses	$ 220,056	$ 220,854

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(3)
-URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant