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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 29, 2024
Mar. 12, 2025
Jun. 28, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 29, 2024    
Current Fiscal Year End Date --12-29    
Document Transition Report false    
Entity File Number 001-40345    
Entity Registrant Name SkyWater Technology, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 37-1839853    
Entity Address, Address Line One 2401 East 86th Street    
Entity Address, City or Town Bloomington    
Entity Address, State or Province MN    
Entity Address, Postal Zip Code 55425    
City Area Code 952    
Local Phone Number 851-5200    
Title of 12(b) Security Common stock, par value $0.01 per share    
Trading Symbol SKYT    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 207.5
Entity Common Stock, Shares Outstanding (in shares)   47,995,078  
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the close of its fiscal year ended December 29, 2024 are incorporated by reference in Part III of this Annual Report on Form 10-K.    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001819974    
Amendment Flag false