Goodwill and Other Intangible Assets

9 Months Ended

Oct. 31, 2012

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

6. Goodwill and Other Intangible Assets

	Weighted Average Remaining Life at 10/31/12		October 31, 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		7.6	$	3,535	$	(1,564	)	$	1,971	$	3,532	$	(1,347	)	$	2,185
Customer relationships		5.3		2,401		(800	)		1,601		2,387		(572	)		1,815
Patents		5.3		723		(241	)		482		719		(172	)		547
Trade name		5.3		197		(66	)		131		196		(47	)		149
Amortizable intangible assets			$	6,856	$	(2,671	)	$	4,185	$	6,834	$	(2,138	)	$	4,696

As of October 31, 2012, the Company had goodwill of $4,320,000, all of which was allocated to the Seamap segment. No impairment was 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 $173,000 for the three months ended October 31, 2012 and 2011, respectively, and $506,000 and $512,000 for the nine months ended October 31, 2012 and 2011, respectively. As of October 31, 2012, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31 (in thousands):
2013	$	172
2014		673
2015		673
2016		673
2017		673
2018 and thereafter		1,321
Total	$	4,185