Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Mar. 31, 2013
Allowances for bad debts and cash discounts	$ 32,276	$ 37,276
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	7,975,160	7,975,160
Treasury stock, shares	1,175,716	1,175,716