Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net earnings (loss)	$ 1,020,878	$ (2,230,368)
Adjustments to reconcile net earnings (loss) to cash provided by operating activities:
Depreciation	730,254	923,966
Deferred taxes	(335,388)	(628,459)
Compensation expense for restricted stock	376,363	249,708
Change in postretirement benefits	8,900	8,215
Lower of cost or net realizable value inventory adjustment	274,093	955,605
Deferred gain on derivatives	696,400
Decrease (increase) in operating assets:
Accounts receivable	(428,031)	3,337,785
Inventories	5,263,830	12,562,592
Federal income taxes recoverable	448,665	(40,639)
Other current assets	(793,679)	(1,025,125)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	(2,834,970)	567,114
Income taxes payable	88,541	(159,694)
Contribution to retirement plan	149,750	149,750
Employee compensation and related expenses	172,018	(42,617)
NET CASH PROVIDED BY OPERATING ACTIVITIES	4,837,624	14,627,833
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(4,228,193)	(3,223,856)
Increase in cash surrender value of officers’ life insurance	(12,970)	(13,110)
NET CASH USED IN INVESTING ACTIVITIES	(4,241,163)	(3,236,966)
FINANCING ACTIVITIES
Paycheck Protection Program loan proceeds	1,690,385
Cash dividends paid	(424,780)	(699,945)
Cash paid for principal portion of finance lease	(75,364)	(24,760)
Cash paid for share repurchases	(1,143,356)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	46,885	(724,705)
INCREASE IN CASH AND RESTRICTED CASH	643,346	10,666,162
CASH AND RESTRICTED CASH AT BEGINNING OF PERIOD	17,057,751	11,667,161
CASH AND RESTRICTED CASH AT END OF PERIOD	$ 17,701,097	$ 22,333,323