Goodwill and Other Intangible Assets

9 Months Ended

Oct. 31, 2011

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

7. Goodwill and Other Intangible Assets

	Weighted Average Remaining Life at 10/31/11		October 31, 2011							January 31, 2011
			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		8.7	$	3,573	$	(1,295	)	$	2,278	$	3,523	$	(1,101	)	$	2,422
Customer relationships		6.3		2,416		(503	)		1,913		2,396		(274	)		2,122
Patents		6.3		728		(152	)		576		721		(82	)		639
Trade name		6.3		198		(41	)		157		197		(22	)		175
Amortizable intangible assets			$	6,915	$	(1,991	)	$	4,924	$	6,837	$	(1,479	)	$	5,358

As of October 31, 2011, 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 $173,000 and $164,000 for the three months ended October 31, 2011 and 2010, respectively, and $512,000 and $459,000 for the nine months ended October 31, 2011 and 2010, respectively. As of October 31, 2011, future estimated amortization expense related to amortizable intangible assets was estimated to be:

For fiscal years ending January 31 (in thousands):

2012	$	170
2013		679
2014		679
2015		679
2016		679
2017 and thereafter		2,038
Total	$	4,924