CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $)	Sep. 30, 2011	Mar. 31, 2011
Stockholders' equity
Preferred stock par value	$ 1	$ 1
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0
Common stock par value	$ 0.5	$ 0.5
Common stock shares authorized	40,000,000	40,000,000
Common stock shares issued	2,089,116	2,089,116
Common stock shares outstanding	2,027,949	2,029,949
Treasury stock, shares	61,167	59,167