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v3.22.2.2

Note 1 - Basis of Presentation (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disposal Group, Operating Expense | $ 1,194 | $ 0 | $ 6,388 | $ 0
Goodwill, Written Off |  |  | 630 |
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations [Member] | Manufacturing Facility in Japan [Member] |  |  |  |
Disposal Group, Operating Expense | 1,200 |  | 6,400 |
Disposal Group, Employee Severance, Operating Expense | 100 |  | 2,300 |
Disposal Group, Write-down of Fixed Assets, Operating Expense | $ 1,100 |  | 2,300 |
Disposal Group, Facility-related Charges, Operating Expense |  |  | 900 |
Goodwill, Written Off |  |  | 600 |
Disposal Group, Other Closure Related Charges, Operating Expense |  |  | $ 300 |

X
- Definition Amount of employee severance, operating expense, attributable to disposal group. + References No definition available. + Details
Name: | prlb_DisposalGroupEmployeeSeveranceOperatingExpense
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of facility-related charges, operating expense, attributable to disposal group. + References No definition available. + Details
Name: | prlb_DisposalGroupFacilityrelatedChargesOperatingExpense
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating expense from disposal group. + References No definition available. + Details
Name: | prlb_DisposalGroupOperatingExpense
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of other closure related charges, operating expense, attributable to disposal group.. + References No definition available. + Details
Name: | prlb_DisposalGroupOtherClosureRelatedChargesOperatingExpense
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write down of fixed assets, operating expense, attributable to disposal group. + References No definition available. + Details
Name: | prlb_DisposalGroupWritedownOfFixedAssetsOperatingExpense
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of write-off of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References No definition available. + Details
Name: | prlb_GoodwillWrittenOff
Namespace Prefix: | prlb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfByMeansOtherThanSaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=prlb_ManufacturingFacilityInJapanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |