Note 1 - General Business (Details Textual) - USD ($) $ in Millions	1 Months Ended
	Jul. 31, 2022	May 31, 2022	Mar. 31, 2022
Liquidity			$ 20.6
Convertible Debt [Member] | Four Board Members and One Unrelated Party [Member] | Subsequent Event [Member]
Proceeds from Issuance of Long-Term Debt, Total		$ 10.0
Hoosier Energy [Member] | Forecast [Member]
Long-Term Contract for Purchase of Electric Power, Term (Year)	3 years 6 months