Note 10 - Product Warranty Obligations - Recognition of Deferred Revenue Related to Extended Warranties 2 (Details) - Extended Warranties [Member]	Mar. 31, 2026 USD ($)
Revenue performance obligation	$ 226,631,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue performance obligation	30,404
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue performance obligation	42,859,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-04-01
Revenue performance obligation	40,628,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2029-04-01
Revenue performance obligation	33,826,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2030-04-01
Revenue performance obligation	26,527
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2031-04-01
Revenue performance obligation	$ 52,387,000