Note 9 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties 2 (Details)	Sep. 30, 2025 USD ($)
Revenue performance obligation	$ 211,430,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01
Revenue performance obligation	9,199
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01
Revenue performance obligation	38,423,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-10-01
Revenue performance obligation	39,785,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-10-01
Revenue performance obligation	34,718,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-10-01
Revenue performance obligation	28,153,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-10-01
Revenue performance obligation	$ 61,152,000

GENERAC HOLDINGS INC. 10-Q