Note 16 - Subsequent Event	9 Months Ended
Sep. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	16. Subsequent Event *Agreement to acquire ecobee Inc.* On November 1, 2021, the Company entered into a definitive agreement to acquire ecobee Inc. (ecobee). Headquartered in Toronto, Canada, ecobee is a leader in sustainable home technology solutions including smart thermostats that deliver significant energy savings, security and peace of mind. Pursuant to the agreement, the Company will acquire all of the outstanding ownership interests of ecobee from the ecobee securityholders. As consideration, the Company will pay or cause to be paid consideration valued at up to $770,000, comprising (i) $200,000 in cash, subject to customary adjustments, to be paid at closing, (ii) $450,000 of GNRC common stock to be issued at closing, and (iii) contingent consideration paid in the form of GNRC common stock with an aggregate value of up to $120,000 based on the achievement of certain performance targets by ecobee as of June 30, 2022 and June 30, 2023. The contingent consideration will be fixed and accelerated upon certain corporate transactions, including a change of control of the Company. The Company expects the acquisition to close in the fourth quarter of 2021, subject to customary closing conditions, including clearance under the Hart-Scott-Rodino Antitrust Improvement Act. Acquisition of Tank Utility, Inc. On October 1, 2021, the Company acquired Tank Utility, Inc., a provider of IoT propane tank monitoring that enables the optimization of propane fuel logistics.

Note 16 - Subsequent Event

9 Months Ended

Sep. 30, 2021

16. Subsequent Event

Agreement to acquire ecobee Inc.

On November 1, 2021, the Company entered into a definitive agreement to acquire ecobee Inc. (ecobee). Headquartered in Toronto, Canada, ecobee is a leader in sustainable home technology solutions including smart thermostats that deliver significant energy savings, security and peace of mind. Pursuant to the agreement, the Company will acquire all of the outstanding ownership interests of ecobee from the ecobee securityholders. As consideration, the Company will pay or cause to be paid consideration valued at up to $770,000, comprising (i) $200,000 in cash, subject to customary adjustments, to be paid at closing, (ii) $450,000 of GNRC common stock to be issued at closing, and (iii) contingent consideration paid in the form of GNRC common stock with an aggregate value of up to $120,000 based on the achievement of certain performance targets by ecobee as of June 30, 2022 and June 30, 2023. The contingent consideration will be fixed and accelerated upon certain corporate transactions, including a change of control of the Company. The Company expects the acquisition to close in the fourth quarter of 2021, subject to customary closing conditions, including clearance under the Hart-Scott-Rodino Antitrust Improvement Act.

Acquisition of Tank Utility, Inc.

On October 1, 2021, the Company acquired Tank Utility, Inc., a provider of IoT propane tank monitoring that enables the optimization of propane fuel logistics.