Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands			12 Months Ended
	Mar. 31, 2021	Jan. 08, 2021	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total			$ 16,811	$ (0)
Goodwill, Ending Balance			26,651	23,966	$ 23,966
EOS Power Panama Inc. [Member]
Revenues, Total				12,000
Business Combination, Acquisition Related Costs			500
rms Connectors, Inc. [Member]
Payments to Acquire Businesses, Net of Cash Acquired, Total		$ 9,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred	$ (7,800)
Goodwill, Ending Balance		$ 0
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			17,100	$ 1,900
EOS Power Panama Inc. [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,160		2,200
Goodwill, Ending Balance	$ 2,499
EOS Power Panama Inc. [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 1,900
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)			16 years
EOS Power Panama Inc. [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 300
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)			2 years