Note 7 - Earnings Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Weighted Average Equity Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	315,400	346,500
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	2,850,000	2,850,000
Incremental Equity Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	266,000	56,000