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Note 12 - Debt (Details Textual) - USD ($)			3 Months Ended		12 Months Ended
	Jun. 28, 2021	Apr. 01, 2019	Dec. 31, 2021	Jul. 05, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021
Interest Costs Capitalized					$ 0	$ 0
Interest Paid, Excluding Capitalized Interest, Operating Activities					699,000	369,000
Proceeds from Notes Payable, Total					0	$ 3,558,000
Finance Lease, Liability, Total			$ 4,452,000		4,452,000
Machinery at Sypris Technologies Facility [Member]
Finance Lease, Liability, Total			$ 4,500,000		$ 4,500,000
Machinery at Sypris Technologies Facility [Member] | Finance Lease Obligations [Member]
Debt, Weighted Average Interest Rate			8.50%		8.50%
Outstanding Borrowings [Member]
Debt, Weighted Average Interest Rate			6.50%		6.50%	5.50%
Paycheck Protection Program CARES Act [Member]
Proceeds from Notes Payable, Total				$ 3,558,000
Notes Payable, Total				$ 3,558,000
Debt Instrument, Decrease, Forgiveness	$ 3,558,000				$ 3,599,000
Promissory Notes with Maturity on April 1, 2021 and April 1, 2023 [Member] | Gill Family Capital Management [Member]
Subordinated Debt, Ending Balance			$ 6,500,000		$ 6,500,000	$ 6,500,000
Debt Instrument, Interest Rate, Stated Percentage							8.00%
Debt Instrument, Allowance for Payment Deferral Period (Month)			1 year		18 months
Debt Instrument, Maximum Allowance of Interest Due on Deferred Payments, Percent					60.00%
Promissory Notes with Maturity on April 1, 2022 [Member] | Gill Family Capital Management [Member]
Subordinated Debt, Ending Balance			$ 2,500,000		$ 2,500,000
Promissory Notes with Maturity on April 1, 2024 [Member] | Gill Family Capital Management [Member]
Subordinated Debt, Ending Balance			2,000,000		2,000,000
Promissory Note [Member] | Gill Family Capital Management [Member] | Five-year Treasury Note Average During Preceding 90-day Period [Member]
Debt Instrument, Basis Spread on Variable Rate		5.00%
Promissory Note with Maturity on April 1, 2021 [Member] | Gill Family Capital Management [Member]
Subordinated Debt, Ending Balance			2,500,000		2,500,000
Equipment Financing Obligations [Member]
Finance Lease, Liability, Total			1,204,000		1,204,000
Long-term Debt, Total			$ 1,200,000		$ 1,200,000
Equipment Financing Obligations [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Effective Percentage			4.40%		4.40%
Equipment Financing Obligations [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Effective Percentage			8.10%		8.10%

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