Note 7 - Investment in Foreign Joint Venture (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	$ 73,293	$ 73,114
Affiliated Entity [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	0
Bomay [Member]
Equity Method Investment, Ownership Percentage	40.00%
Equity Method Investment, Summarized Financial Information Accumulated Statutory Reserve	$ 2,660	2,660
Equity Method Investment, Remaining Life of Joint Venture (Year)	8 years
Accretion (Amortization) of Discounts and Premiums, Investments	$ 100	$ 100
Bomay [Member] | Baoji Oilfield Machinery Co Ltd [Member]
Equity Method Investment, Ownership Percentage	51.00%
Bomay [Member] | A A Energies Inc [Member]
Equity Method Investment, Ownership Percentage	9.00%