XML 38 R38.htm IDEA: XBRL DOCUMENT
v3.19.3

Note 8 - Leases (Details Textual) Pure in Thousands, $ in Thousands | Sep. 30, 2019 USD ($) | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | ---
Operating Lease, Right-of-Use Asset | $ 12,008 |  | $ 0
Operating Lease, Liability, Total | $ 12,370 |  |
Lessee, Financial Lease, Liability, Number of Leases | 0 |  |
Lessee, Operating Lease, Lease Not yet Commenced, Number of Leases | 0 |  |
Minimum [Member] | Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member] |  |  |
Lessee, Operating Lease, Term of Contract | 1 year |  |
Maximum [Member] | Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member] |  |  |
Lessee, Operating Lease, Term of Contract | 10 years |  |
Accounting Standards Update 2016-02 [Member] |  |  |
Operating Lease, Right-of-Use Asset |  | $ 13,100 |
Operating Lease, Liability, Total |  | $ 13,100 |

X
- Definition The number of the lessee's finance leases. + References No definition available. + Details
Name: | prlb_LesseeFinancialLeaseLiabilityNumberOfLeases
Namespace Prefix: | prlb_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of the lessee's operating leases which have not yet commenced. + References No definition available. + Details
Name: | prlb_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases
Namespace Prefix: | prlb_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=prlb_OfficeSpaceManufacturingFacilitiesAndCertainCompanyVehiclesAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |