Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Jan. 31, 2013
Financial information by business segment
Total Assets	$ 183,721	$ 190,407
Equipment Leasing [Member]
Financial information by business segment
Total Assets	165,373	171,971
Seamap [Member]
Financial information by business segment
Total Assets	18,387	18,578
Eliminations [Member]
Financial information by business segment
Total Assets	$ (39)	$ (142)