Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2017

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31
	2017		2016
Prime coil inventory	$	8,481,605	$	14,168,626
Non-standard coil inventory		1,119,170		992,163
Tubular raw material		1,480,730		1,566,048
Tubular finished goods		23,837,045		25,212,291
	$	34,918,550	$	41,939,128

Property, Plant and Equipment [Table Text Block]

Buildings (years)		20
Machinery and equipment (years)		10
Yard improvements (years)	5	to	10
Loaders and other rolling stock (years)	5	to	10