Treasury Stock and Repurchase Program (Detail Textuals) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Jan. 31, 2013	Jan. 31, 2012	Sep. 19, 2012 Treasury Stock	Jan. 19, 2011 Treasury Stock	Jan. 31, 2013 Treasury Stock	Jan. 31, 2012 Treasury Stock	Jan. 31, 2012 Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Authorized repurchase amount of common stock					$ 3,000,000	$ 3,200,000
Number of treasury shares	12,890	3,440				18,400	16,330	78,500	85,219
Total average cost	$ 117,000	$ 30,000	$ 147,000	$ 946,000		$ 354,000	$ 147,000	$ 946,000	$ 1,036,000