Note 11 - Warranty Reserve Liability (Details Textual)	3 Months Ended
Mar. 31, 2022 USD ($)
Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties	$ 525,000

Amount of increase (decrease) in the standard product warranty accrual from changes in estimates attributable to preexisting product warranties. Excludes extended product warranties.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (c)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482425/460-10-50-8

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration