Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net earnings (loss)	$ (2,230,368)	$ 6,265,582
Adjustments to reconcile net earnings (loss) to cash provided by (used in) operating activities:
Depreciation	923,966	1,072,788
Deferred taxes	(628,459)	(74,118)
Compensation expense for restricted stock	249,708	216,720
Change in postretirement benefits	8,215	22,291
Lower of cost or net realizable value inventory adjustment	955,605
Decrease (increase) in operating assets:
Accounts receivable, net	3,337,785	250,715
Inventories	12,562,592	(14,085,601)
Income taxes recoverable	(40,639)
Other assets	(1,025,125)	(255,136)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	567,114	6,494,080
Income taxes payable	(159,694)	175,845
Contribution to retirement plan	149,750	155,000
Employee compensation and related expenses	(42,617)	(277,933)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	14,627,833	(39,767)
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(3,223,856)	(647,682)
Change in cash surrender value of officers’ life insurance	(13,110)	(18,825)
NET CASH USED IN INVESTING ACTIVITIES	(3,236,966)	(666,507)
FINANCING ACTIVITIES
Cash dividends paid	(699,945)	(771,039)
Cash paid for principal portion of finance lease	(24,760)
NET CASH USED IN FINANCING ACTIVITIES	(724,705)	(771,039)
INCREASE (DECREASE) IN CASH	10,666,162	(1,477,313)
Cash at beginning of period	11,667,161	4,052,582
CASH AT END OF PERIOD	$ 22,333,323	$ 2,575,269