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Operating Leases (Details) - USD ($) | 12 Months Ended
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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. + References No definition available. + Details
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Namespace Prefix: | petz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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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
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration