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Note 3 - Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Mar. 31, 2021
Notes Tables |
Valuation and Qualifying Accounts [Table Text Block] |
|  | Year Ended March 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | 59 |  |  | $ | 39 |  |  | $ | 35 |
Provision for doubtful accounts |  |  | 130 |  |  |  | 191 |  |  |  | 85 |
Write-off of uncollectible accounts receivable |  |  | (150 | ) |  |  | (171 | ) |  |  | (81 | )
Balance at end of year |  | $ | 39 |  |  | $ | 59 |  |  | $ | 39 |

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- Definition The tabular disclosure of valuation and qualifying accounts and reserves. + References No definition available. + Details
Name: | pets_ValuationAndQualifyingAccountsTableTextBlock
Namespace Prefix: | pets_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration