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Basis of Presentation and Principles of Consolidation - Narrative (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 03, 2022
USD ($)
shares
Jul. 04, 2021
shares
Aug. 17, 2022
USD ($)
Jul. 03, 2022
USD ($)
Jul. 04, 2021
USD ($)
Jul. 03, 2022
USD ($)
segment
Jul. 04, 2021
USD ($)
Jan. 02, 2022
USD ($)
Organization, Consolidation And Presentation Of Financial Statements [Line Items]                
Net loss attributable to SkyWater Technology, Inc.       $ (13,005) $ (6,979) $ (29,611) $ (9,790)  
Cash and cash equivalents $ 10,974     $ 10,974   $ 10,974   $ 12,917
Number of operating segments | segment           1    
Restricted Stock Units And Stock Options                
Organization, Consolidation And Presentation Of Financial Statements [Line Items]                
Units excluded from computation (in shares) | shares 2,526,000 3,966,000            
Class B Units                
Organization, Consolidation And Presentation Of Financial Statements [Line Items]                
Preferred units rate of return           8.00%    
Oxbow | Subsequent Event                
Organization, Consolidation And Presentation Of Financial Statements [Line Items]                
Funding agreement with related party     $ 12,500