Note 15 - Commitments and Contingencies (Details Textual) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Amount Financed by Dealers	$ 238,643	$ 115,900,000

Amount financed by dealers to purchase goods from the entity.

No definition available.

Name:	gnrc_AmountFinancedByDealers
Namespace Prefix:	gnrc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant