Note K - Revenue (Details Textual)	3 Months Ended		9 Months Ended
	Dec. 31, 2021 USD ($) T	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) T	Dec. 31, 2020 USD ($)
Number of Reportable Segments			2
Inventory, Material Weight (US Ton) | T	3,000		3,000
Revenue from Contract with Customer, Including Assessed Tax	$ 51,655,943	$ 28,502,049	$ 210,143,277	$ 76,888,329
Pipe Finishing Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0	$ 0	$ 0