Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($)	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES
Net earnings	$ 6,265,582	$ 920,935
Adjustments to reconcile net earnings to cash used in operating activities:
Depreciation	1,072,788	996,139
Deferred taxes	(74,118)	810,705
Compensation expense for restricted stock	216,720	216,720
Provision for postretirement benefits	22,291	5,159
Decrease (increase) in operating assets:
Accounts receivable, net	250,715	1,884,870
Inventories	(14,085,601)	(11,939,413)
Federal income taxes recoverable		46,453
Other	(255,136)	(267,036)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	6,494,080	4,571,796
Income taxes payable	175,845	32,698
Contribution to retirement plan	155,000	120,000
Employee compensation and related expenses	(277,933)	11,546
NET CASH USED IN OPERATING ACTIVITIES	(39,767)	(2,589,428)
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(647,682)	(275,056)
Change in cash surrender value of officers’ life insurance	(18,825)	(13,125)
NET CASH USED IN INVESTING ACTIVITIES	(666,507)	(288,181)
FINANCING ACTIVITIES
Borrowings under revolving line of credit		3,750,000
Cash dividends paid	(771,039)	(210,283)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(771,039)	3,539,717
INCREASE (DECREASE) IN CASH	(1,477,313)	662,108
Cash at beginning of period	4,052,582	1,461,695
CASH AT END OF PERIOD	$ 2,575,269	$ 2,123,803