Condensed Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Class B Units	Common Units	Capital Units Class A Units	Capital Units Class B Units	Capital Units Common Units	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Total Shareholders’ Equity (Deficit), SkyWater Technology, Inc.	Non-controlling Interests
Beginning balance of units (in shares) at Jan. 03, 2021				0	18,000,000	2,108,000
Beginning balance at Jan. 03, 2021	$ (1,584)			$ 0	$ 0	$ 3,767	$ 0	$ 0	$ 0	$ (3,783)	$ (16)	$ (1,568)
Beginning balance of preferred stock (in shares) at Jan. 03, 2021							0
Beginning balance of common stock (in shares) at Jan. 03, 2021								0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unit-based compensation	5					$ 5					5
Other (in shares)						(2,000)
Corporate conversion (in shares)		18,000,000	2,106,000					31,056,000
Corporate conversion	0		$ (3,772)					$ 311	3,461
Issuance of common stock sold in initial public offering (in shares)								8,004,000
Issuance of common stock sold in initial public offering, net of issuance costs	100,162							$ 80	100,082		100,162
Stock-based compensation	6,539								6,539		6,539
Distribution to VIE member	(1,373)											(1,373)
Net income (loss)	(8,275)									(9,790)	(9,790)	1,515
Ending balance of units (in shares) at Jul. 04, 2021				0	0	0
Ending balance at Jul. 04, 2021	95,474			$ 0	$ 0	$ 0	$ 0	$ 391	110,082	(13,573)	96,900	(1,426)
Ending balance of preferred stock (in shares) at Jul. 04, 2021							0
Ending balance of common stock (in shares) at Jul. 04, 2021								39,060,000
Beginning balance of units (in shares) at Apr. 04, 2021				0	18,000,000	2,106,000
Beginning balance at Apr. 04, 2021	(4,613)			$ 0	$ 0	$ 3,772	$ 0	$ 0	0	(6,594)	(2,822)	(1,791)
Beginning balance of preferred stock (in shares) at Apr. 04, 2021							0
Beginning balance of common stock (in shares) at Apr. 04, 2021								0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Corporate conversion (in shares)		18,000,000	2,106,000					31,056,000
Corporate conversion	0		$ (3,772)					$ 311	3,461
Issuance of common stock sold in initial public offering (in shares)								8,004,000
Issuance of common stock sold in initial public offering, net of issuance costs	100,162							$ 80	100,082		100,162
Stock-based compensation	6,539								6,539		6,539
Distribution to VIE member	(392)											(392)
Net income (loss)	(6,222)									(6,979)	(6,979)	757
Ending balance of units (in shares) at Jul. 04, 2021				0	0	0
Ending balance at Jul. 04, 2021	95,474			$ 0	$ 0	$ 0	$ 0	$ 391	110,082	(13,573)	96,900	(1,426)
Ending balance of preferred stock (in shares) at Jul. 04, 2021							0
Ending balance of common stock (in shares) at Jul. 04, 2021								39,060,000
Beginning balance of units (in shares) at Jan. 02, 2022				0	0	0
Beginning balance at Jan. 02, 2022	$ 59,927			$ 0	$ 0	$ 0	$ 0	$ 398	115,208	(54,479)	61,127	(1,200)
Beginning balance of preferred stock (in shares) at Jan. 02, 2022	0						0
Beginning balance of common stock (in shares) at Jan. 02, 2022	39,836,038							39,836,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to stock-based compensation awards and ESPP (in shares)								614,000
Issuance of common stock pursuant to stock-based compensation awards and ESPP	$ 1,445							$ 6	1,439		1,445
Stock-based compensation	5,050								5,050		5,050
Distribution to VIE member	(867)											(867)
Net income (loss)	(27,926)									(29,611)	(29,611)	1,685
Ending balance of units (in shares) at Jul. 03, 2022				0	0	0
Ending balance at Jul. 03, 2022	$ 37,629			$ 0	$ 0	$ 0	$ 0	$ 404	121,697	(84,090)	38,011	(382)
Ending balance of preferred stock (in shares) at Jul. 03, 2022	0						0
Ending balance of common stock (in shares) at Jul. 03, 2022	40,449,776							40,450,000
Beginning balance of units (in shares) at Apr. 03, 2022				0	0	0
Beginning balance at Apr. 03, 2022	$ 47,509			$ 0	$ 0	$ 0	$ 0	$ 399	118,873	(71,085)	48,187	(678)
Beginning balance of preferred stock (in shares) at Apr. 03, 2022							0
Beginning balance of common stock (in shares) at Apr. 03, 2022								39,905,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock pursuant to stock-based compensation awards and ESPP (in shares)								545,000
Issuance of common stock pursuant to stock-based compensation awards and ESPP	786							$ 5	781		786
Stock-based compensation	2,043								2,043		2,043
Distribution to VIE member	(530)											(530)
Net income (loss)	(12,179)									(13,005)	(13,005)	826
Ending balance of units (in shares) at Jul. 03, 2022				0	0	0
Ending balance at Jul. 03, 2022	$ 37,629			$ 0	$ 0	$ 0	$ 0	$ 404	$ 121,697	$ (84,090)	$ 38,011	$ (382)
Ending balance of preferred stock (in shares) at Jul. 03, 2022	0						0
Ending balance of common stock (in shares) at Jul. 03, 2022	40,449,776							40,450,000