Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
OPERATING ACTIVITIES
Net earnings	$ 194,772	$ 3,599,893
Adjustments to reconcile net earnings to cash provided by (used in) operating activities:
Depreciation	304,781	357,596
Deferred taxes	(16,039)	96,164
Compensation expense for restricted stock	83,236	72,240
Change in postretirement benefits	2,738	7,430
Decrease (increase) in operating assets:
Accounts receivable	(2,685,454)	(789,499)
Inventories	5,305,040	(14,269,173)
Other assets, current and non-current	(12,322)	(106,821)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	(3,215,889)	9,391,535
Income taxes payable	65,157	862,259
Contribution to retirement plan	50,250	45,000
Employee compensation and related expenses	(8,649)	313,262
Other non-current liabilities	26,425
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	94,046	(420,114)
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(672,410)	(187,223)
Increase in cash surrender value of officers’ life insurance	(4,370)	(6,275)
NET CASH USED IN INVESTING ACTIVITIES	(676,780)	(193,498)
FINANCING ACTIVITIES
Cash dividends paid	(279,978)	(140,189)
NET CASH USED IN FINANCING ACTIVITIES	(279,978)	(140,189)
INCREASE (DECREASE) IN CASH	(862,712)	(753,801)
CASH AT BEGINNING OF PERIOD	11,667,161	4,052,582
CASH AT END OF PERIOD	$ 10,804,449	$ 3,298,781