Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES
Net earnings	$ 8,150,464	$ 8,155,637
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Depreciation	1,839,890	1,878,158
Deferred taxes	(90,700)	122,296
Change in post-retirement benefits other than pensions	76,195	94,912
Changes in operating assets and liabilities:
Accounts receivable, net	(3,689,423)	(3,908,803)
Inventories	(2,074,410)	(14,556,974)
Other	(10,456)	3,961
Accounts payable and accrued expenses	4,752,392	426,021
Contribution to profit sharing plan	2,500	6,000
Employee compensation and related expenses	(252,371)	536,240
Income taxes payable	(252,497)	256,398
Net cash provided (used) by operating activities	8,451,584	(6,986,154)
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(321,403)	(515,342)
Proceeds from sales of assets	1,800
Increase in cash value of officers' life insurance	(61,000)	(56,000)
Net cash used in investing activities	(380,603)	(571,342)
FINANCING ACTIVITIES
Cash dividends paid	(3,399,723)	(5,031,588)
Principal payments on long-term debt		(13,507)
Net cash used in financing activities	(3,399,723)	(5,045,095)
Increase (decrease) in cash	4,671,258	(12,602,591)
Cash at beginning of year	7,210,290	19,812,881
Cash at end of year	$ 11,881,548	$ 7,210,290