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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2023
Feb. 09, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-35435    
Entity Registrant Name Proto Labs, Inc.    
Entity Incorporation, State or Country Code MN    
Entity Tax Identification Number 41-1939628    
Entity Address, Address Line One 5540 Pioneer Creek Drive    
Entity Address, City or Town Maple Plain    
Entity Address, State or Province MN    
Entity Address, Postal Zip Code 55359    
City Area Code 763    
Local Phone Number 479-3680    
Title of 12(b) Security Common Stock, Par Value $0.001 Per Share    
Trading Symbol PRLB    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 0.9
Entity Common Stock, Shares Outstanding   25,721,957  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Registrant’s definitive proxy statement relating to its 2024 annual meeting of shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.
    
Entity Central Index Key 0001443669    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false