Note 2 - Acquisitions	6 Months Ended
Jun. 30, 2023
Notes to Financial Statements
Business Combination Disclosure [Text Block]	2. Acquisitions **Fiscal 2023* Acquisitions*** On February 1, 2023, the Company acquired REFUstor, headquartered in Pfullingen, Germany. REFUstor is a developer and supplier of battery storage hardware products, advanced software, and platform services for the commercial and industrial market. The accompanying condensed consolidated financial statements include the results of REFUstor from the date of acquisition through June 30, 2023. The Company recorded its preliminary purchase price allocation for REFUstor during the first quarter of 2023, based on its estimates of the fair value of the acquired assets and assumed liabilities. Purchase accounting will be finalized prior to March 31, 2024, and there have not been any material changes to the balances acquired as of June 30, 2023. Pro forma and other financial information are not presented as the effects of the REFUstor acquisition are not material to the Company's results of operations or financial position prior to the acquisition date. **Fiscal 2022* Acquisitions*** On June 30, 2022, the Company acquired EEC. Headquartered in Marlborough, Massachusetts, EEC is an industrial generator distributor as well as a provider of data center and telecom facility design, build, maintenance, and repair services. On October 3, 2022, the Company acquired Blue Pillar, an industrial IoT platform developer that designs, deploys, and manages industrial IoT network software solutions to enable distributed energy generation monitoring and control. The combined purchase price for these two acquisitions was $25,654, net of cash acquired. The Company recorded its preliminary purchase price allocation for EEC and Blue Pillar during the second quarter and fourth quarter of 2022, respectively, based on its estimates of the fair value of the acquired assets and assumed liabilities. Purchase accounting for EEC was finalized in the second quarter of 2023 and did not result in material adjustments to the Company's preliminary estimates. Through the second quarter of 2023, the combined purchase price for EEC and Blue Pillar has increased to $27,456 due to working capital true-ups. The accompanying condensed consolidated financial statements include the results of the acquired businesses since the dates of acquisition through June 30, 2023. Pro forma and other financial information are not presented as the effects of the 2022 acquisitions are not material to the Company's results of operations or financial position prior to the acquisition dates.

Note 2 - Acquisitions

6 Months Ended

Jun. 30, 2023

Business Combination Disclosure [Text Block]

2. Acquisitions

Fiscal 2023 Acquisitions

On February 1, 2023, the Company acquired REFUstor, headquartered in Pfullingen, Germany. REFUstor is a developer and supplier of battery storage hardware products, advanced software, and platform services for the commercial and industrial market.

The accompanying condensed consolidated financial statements include the results of REFUstor from the date of acquisition through June 30, 2023. The Company recorded its preliminary purchase price allocation for REFUstor during the first quarter of 2023, based on its estimates of the fair value of the acquired assets and assumed liabilities. Purchase accounting will be finalized prior to March 31, 2024, and there have not been any material changes to the balances acquired as of June 30, 2023. Pro forma and other financial information are not presented as the effects of the REFUstor acquisition are not material to the Company's results of operations or financial position prior to the acquisition date.

Fiscal 2022 Acquisitions

On June 30, 2022, the Company acquired EEC. Headquartered in Marlborough, Massachusetts, EEC is an industrial generator distributor as well as a provider of data center and telecom facility design, build, maintenance, and repair services.

On October 3, 2022, the Company acquired Blue Pillar, an industrial IoT platform developer that designs, deploys, and manages industrial IoT network software solutions to enable distributed energy generation monitoring and control.

The combined purchase price for these two acquisitions was $25,654, net of cash acquired. The Company recorded its preliminary purchase price allocation for EEC and Blue Pillar during the second quarter and fourth quarter of 2022, respectively, based on its estimates of the fair value of the acquired assets and assumed liabilities. Purchase accounting for EEC was finalized in the second quarter of 2023 and did not result in material adjustments to the Company's preliminary estimates. Through the second quarter of 2023, the combined purchase price for EEC and Blue Pillar has increased to $27,456 due to working capital true-ups. The accompanying condensed consolidated financial statements include the results of the acquired businesses since the dates of acquisition through June 30, 2023. Pro forma and other financial information are not presented as the effects of the 2022 acquisitions are not material to the Company's results of operations or financial position prior to the acquisition dates.