Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($)	9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net earnings (loss)	$ 603,588	$ (2,301,726)
Adjustments to reconcile net earnings (loss) to cash provided by (used in) operating activities:
Depreciation	996,139	1,202,549
Deferred taxes	702,222	(673,413)
Compensation expense for restricted stock	216,720
Provision for postretirement benefits	5,159	43,262
Decrease (increase) in operating assets:
Accounts receivable, net	1,884,870	(106,616)
Inventories	(11,480,885)	7,375,622
Federal income taxes recoverable	46,453	(913,347)
Other	(267,036)	(39,312)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	4,571,796	(595,940)
Contribution to retirement plan	120,000	126,500
Employee compensation and related expenses	11,546	(85,157)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(2,589,428)	4,032,422
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(275,056)	(655,032)
Change in cash surrender value of officers’ life insurance	(13,125)	(44,250)
NET CASH USED IN INVESTING ACTIVITIES	(288,181)	(699,282)
FINANCING ACTIVITIES
Borrowings under revolving line of credit	3,750,000
Cash dividends paid	(210,283)	(203,982)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	3,539,717	(203,982)
INCREASE IN CASH	662,108	3,129,158
Cash at beginning of period	1,461,695	2,796,762
CASH AT END OF PERIOD	$ 2,123,803	$ 5,925,920