Other Financial Instruments and Fair Value Measurements (Details Textual) (USD $)	Jan. 31, 2013
Other Financial Instruments and Fair Value Measurements (Textual) [Abstract]
Company's Municipal bond mature in 2013	$ 1,100,000
Company's Municipal bond mature in 2014	700,000
Company's Municipal bond mature in 2015	2,700,000
Company's Municipal bond mature in 2016	500,000
Company's Municipal bond mature in 2017 and beyond	$ 21,500,000