Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
OPERATING ACTIVITIES
Net earnings (loss)	$ (2,301,726)	$ 817,775
Adjustments to reconcile net earnings (loss) to cash provided by operating activities:
Depreciation	1,202,549	1,275,150
Deferred taxes	(673,413)	106,734
Provision for postretirement benefits	43,262	64,515
Decrease (increase) in operating assets:
Accounts receivable, net	(106,616)	2,096,891
Inventories	7,375,622	(2,318,979)
Federal income taxes recoverable	(913,347)
Other	(39,312)	(85,682)
Accounts payable and accrued expenses	(595,940)	2,349,912
Contribution to retirement plan	126,500	129,000
Employee compensation and related expenses	(85,157)	(51,105)
NET CASH PROVIDED BY OPERATING ACTIVITIES	4,032,422	4,384,211
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(655,032)	(1,897,132)
Change in cash surrender value of officers’ life insurance	(44,250)	(46,750)
NET CASH USED IN INVESTING ACTIVITIES	(699,282)	(1,943,882)
FINANCING ACTIVITIES
Cash dividends paid	(203,982)	(203,982)
NET CASH USED IN FINANCING ACTIVITIES	(203,982)	(203,982)
INCREASE IN CASH	3,129,158	2,236,347
Cash at beginning of period	2,796,762	2,225,924
CASH AT END OF PERIOD	$ 5,925,920	$ 4,462,271