Note K - Revenue (Details Textual)	3 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)
Number of Reportable Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 65,916,439	$ 23,524,600
Pipe Finishing Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 0		$ 0