Segment Reporting (Details Textual) (USD $)	3 Months Ended								12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 28,401,000	$ 18,574,000	$ 23,080,000	$ 34,630,000	$ 37,034,000	$ 28,020,000	$ 21,278,000	$ 26,502,000	$ 104,685,000	$ 112,834,000	$ 71,363,000
Segment Reporting (Textual) [Abstract]
Reduction in capital expenditures and fixed assets									349,000	272,000	292,000
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues									$ 1,041,000	$ 297,000	$ 1,117,000