Goodwill and Other Intangible Assets

3 Months Ended

Apr. 30, 2012

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

6. Goodwill and Other Intangible Assets

	Weighted Average Remaining Life at 4/30/12		April 30, 2012							January 31, 2012
			Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
					(in thousands)							(in thousands)
Goodwill			$	4,320						$	4,320
Proprietary rights		8.2	$	3,600	$	(1,428	)	$	2,172	$	3,532	$	(1,347	)	$	2,185
Customer relationships		5.8		2,428		(657	)		1,771		2,387		(572	)		1,815
Patents		5.8		731		(198	)		533		719		(172	)		547
Trade name		5.8		199		(54	)		145		196		(47	)		149
Amortizable intangible assets			$	6,958	$	(2,337	)	$	4,621	$	6,834	$	(2,138	)	$	4,696

As of April 30, 2012, the Company had goodwill of $4,320,000, all of which was allocated to the Seamap segment. No impairment has been recorded against the goodwill account.

Amortizable intangible assets are amortized over their estimated useful lives of eight to 15 years using the straight-line method. Aggregate amortization expense was $169,000 and $172,000 for the three months ended April 30, 2012 and 2011, respectively. As of April 30, 2012, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31 (in thousands):
2013	$	511
2014		682
2015		682
2016		682
2017		682
2018 and thereafter		1,382
Total	$	4,621