Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
OPERATING ACTIVITIES
Net earnings (loss)	$ (1,461,219)	$ 525,949
Adjustments to reconcile net earnings (loss) to cash provided by (used in) operating activities:
Depreciation	401,999	427,950
Deferred taxes	(41,156)	35,578
Change in postretirement benefits	14,420	23,171
Federal and state income taxes recoverable	(1,068,338)
Decrease (increase) in operating assets:
Accounts receivable	(2,525,312)	1,244,504
Inventories	2,079,596	680,834
Other current assets	118,106	126,456
Accounts payable and accrued expenses	704,630	(778,408)
Income taxes payable		62,974
Contribution to retirement plan	43,500	51,000
Employee compensation and related expenses	36,288	118,971
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(1,697,486)	2,518,979
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(198,688)	(835,230)
Increase in cash surrender value of officers’ life insurance	(14,750)	(17,250)
NET CASH USED IN INVESTING ACTIVITIES	(213,438)	(852,480)
FINANCING ACTIVITIES
Cash dividends paid	(67,994)	(67,994)
NET CASH USED IN FINANCING ACTIVITIES	(67,994)	(67,994)
INCREASE (DECREASE) IN CASH	(1,978,918)	1,598,505
Cash at beginning of period	2,796,762	2,225,924
CASH AT END OF PERIOD	$ 817,844	$ 3,824,429