Note 15 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	12 Months Ended	252 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 1994
Arezzo Revenue Agency [Member]
Loss Contingency, Estimate of Possible Loss			$ 12,000	$ 12,000
EOS Claim From Principal Commissioner of Customs [Member]
Loss Contingency Accrual			$ 0
EOS Claim From Principal Commissioner of Customs [Member] | EOS Power Panama Inc. [Member]
Customs Duties and Imposed Fines	$ 900				$ 1,400
Payment for Customs Duties and Imposed Fines and Penalties		$ 500
Indemnification Period (Year)	7 years