Note N - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended						9 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Net earnings	$ 1,375,893	$ 2,470,908	$ 11,184,374	$ (2,961,833)	$ 13,177,614	$ 11,311,797	$ 15,031,175	$ 21,527,578
Less: Allocation to unvested restricted stock units	18,656			5,992			240,482	966,761
Net earnings (loss) attributable to common shareholders	$ 1,357,237			$ (2,967,825)			$ 14,790,693	$ 20,560,817
Weighted average common shares outstanding (in shares)	7,275,212			6,610,204			7,196,452	6,593,343