Shareholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Jun. 30, 2011	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2011
Shareholders' Equity (Textual) [Abstract]
Common stock issued in follow-on public offering	2,300,000
Net proceeds to company	$ 31,000	$ 31,028
Preferred stock, shares authorized		1,000,000	1,000,000
Preferred stock, shares outstanding
Common stock, shares authorized		20,000,000	20,000,000
Common stock, shares issued		13,556,000	13,763,000
Shares surrendered in exchange for payment of taxes		1,000	290	0
Average fair value of shares		$ 14.10	$ 12.60