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Operating Leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Disclosure Text Block [Abstract]
Lease term	The remaining lease term of the Company’s leases ranges from approximately 2 to 7 years.
Rental expenses, including operating leases with related parties		$ 218,414

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- Definition

Lease term.

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No definition available.

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Namespace Prefix:	petz_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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No definition available.

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Namespace Prefix:	us-gaap_
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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration