Note 8 - Long-term Debt (Details Textual)						3 Months Ended	6 Months Ended	9 Months Ended	12 Months Ended
Note 8 - Long-term Debt (Details Textual)	Nov. 21, 2025 USD ($)	Mar. 26, 2025 USD ($)	Jan. 20, 2025 USD ($)	Dec. 17, 2024 USD ($) T	May 19, 2022 USD ($)	Mar. 31, 2025	Dec. 31, 2024 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2021 USD ($)	Jul. 11, 2023 USD ($)	Jun. 13, 2019 USD ($)
Deferred Debt Issuance Cost, Writeoff									$ 131,000
Gain (Loss) on Extinguishment of Debt									(156,000)	$ 0	$ 0
Debt Modification Expense									176,000	(0)	(0)
Long-Term Debt									144,018,000
Repayments of Long-Term Debt									153,313,000	42,000,000	$ 18,437,000
Interest Expense, Debt									0	198,000
Bailment Pool Chassis Inventories, Net							$ 17,489,000		16,701,000	17,489,000
Floor Plan Obligations							2,612,000		$ 4,184,000	2,612,000
Interest Rate Swap Effective May 31, 2019 Through May 31, 2024 [Member]
Derivative Liability, Notional Amount														$ 175,000,000
Derivative, Fixed Interest Rate									2.424%					2.424%
Interest Rate Swap [Member]
Derivative Counter Party Risk Number of Financial Institutions									1
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments, Tax									$ (0)	(485,000)
Interest Expense, Debt									0	198,000
Derivative, Notional Amount	$ 75,000,000				$ 125,000,000
Derivative, Nonmonetary Notional Amount, Flow Rate, Percentage	3.30%				2.718%
Interest Rate Derivative Liabilities, at Fair Value							2,340,000		698,000	2,340,000
Derivative Liability							1,732,000		517,000	1,732,000
Steel Hedging Instrument [Member]
Derivative, Nonmonetary Notional Amount, Mass (US Ton) \| T				3,000
Derivative, Fixed Payments				$ 819,000
Derivative Liability							54,000		50,000	54,000
Secured Debt [Member]
Debt Instrument, Unamortized Discount							162,000		357,000	162,000
Long-Term Debt							147,526,000		144,018,000	147,526,000
Bailment Pool Arrangement [Member]
Interest Expense, Long-Term Debt									1,021,000	630,000
Prepaid Expenses and Other Current Assets [Member] \| Interest Rate Swap [Member]
Interest Rate Derivative Liabilities, at Fair Value							1,712,000		461,000	1,712,000
Other Noncurrent Assets [Member] \| Interest Rate Swap [Member]
Interest Rate Derivative Liabilities, at Fair Value							628,000		$ 237,000	628,000
Prime Rate [Member] \| Bailment Pool Arrangement [Member]
Debt Instrument, Interest Rate, Effective Percentage									6.75%
Maximum [Member] \| Prime Rate [Member] \| Bailment Pool Arrangement [Member]
Debt Instrument, Basis Spread on Variable Rate									8.00%
Minimum [Member] \| Prime Rate [Member] \| Bailment Pool Arrangement [Member]
Debt Instrument, Basis Spread on Variable Rate									0.00%
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 125,000
Line of Credit Facility, Current Borrowing Capacity									$ 5,000,000
Line of Credit Facility, Remaining Borrowing Capacity									119,450,000
Revolving Credit Facility [Member] \| New York Federal Reserve Bank NYFRB [Member]
Debt Instrument, Basis Spread on Variable Rate		0.50%
Revolving Credit Facility [Member] \| One Month Adjusted Term SOFR Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Revolving Credit Facility [Member] \| Maximum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.30%
Revolving Credit Facility [Member] \| Maximum [Member] \| Leverage Ratio Two [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		1.00%
Revolving Credit Facility [Member] \| Minimum [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.15%
Revolving Credit Facility [Member] \| Minimum [Member] \| Leverage Ratio Two [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		0.375%
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 10,000
Swingline Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity		15,000
Line of Credit [Member] \| Floor Plan Arrangement [Member]
Line of Credit Facility, Maximum Borrowing Capacity									5,000,000
Interest Expense, Debt									2,050,000	1,011,000
Floor Plan Obligations							2,612,000		$ 4,184,000	2,612,000
Line of Credit [Member] \| Secured Overnight Financing Rate (SOFR) [Member] \| Floor Plan Arrangement [Member]
Debt Instrument, Basis Spread on Variable Rate									1.75%
Floor Plan Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 20,000,000
Debt Instrument, Basis Spread on Variable Rate			0.50%
Senior Secured Term Loan Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 150,000
Senior Secured Term Loan Facility [Member] \| Maximum [Member] \| Leverage Ratio One [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.00%
Senior Secured Term Loan Facility [Member] \| Minimum [Member] \| Leverage Ratio One [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		1.375%
Credit Agreement [Member]
Debt Instrument, Unamortized Discount												$ 312,000
Debt Issuance Costs, Net												863,000
Debt Instrument, Upfront Fee												260,000
Deferred Debt Issuance Cost, Writeoff												131,000
Write off of Unamortized Debt Discount												$ 25,000
Gain (Loss) on Extinguishment of Debt									$ 156,000
Debt Modification Expense								$ 176,000
Repayments of Long-Term Debt							42,000,000
Debt Instrument Covenant Leverage Ratio						3.50%
Credit Agreement [Member] \| Asset Pledged as Collateral [Member] \| Cash Surrender Value of Corporate Owned Life Insurance Policies [Member]
Line of Credit Facility, Maximum Borrowing Capacity													$ 1,000
Credit Agreement [Member] \| Asset Pledged as Collateral [Member] \| Cash Surrender Value of Corporate Owned Life Insurance Policies [Member] \| Other Noncurrent Liabilities [Member]
Secured Debt							$ 546,000		$ 427,000	$ 546,000
Credit Agreement [Member] \| Maximum [Member]
Line of Credit Facility Increase in Maximum Borrowing Capacity		$ 175,000

DOUGLAS DYNAMICS, INC 10-K