Acquired Intangible Assets

9 Months Ended

Oct. 31, 2013

Goodwill And Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets

8. Acquired Intangible Assets

Intangible assets acquired in a business combination are recorded under the purchase method of accounting at their estimated fair values at the date of acquisition. The Company amortizes acquired intangible assets over their estimated useful lives.

The following table reflects the carrying value of intangible assets as of October 31, 2013:

	October 31, 2013
	Cost		Accumulated Amortization			Net Book Value
Intellectual property	$	3,505	$	(672	)	$	2,833
Access to facilities contract		38		(38	)		—
Total	$	3,543	$	(710	)	$	2,833

The following table reflects the carrying value of intangible assets as of January 31, 2013:

	January 31, 2013
	Cost		Accumulated Amortization			Net Book Value
Intellectual property	$	3,505	$	(409	)	$	3,096
Access to facilities contract		38		(38	)		—
Total	$	3,543	$	(447	)	$	3,096

For the three and nine months ended October 31, 2013, amortization expense of intangible assets was $88 and $263, respectively. For the three and nine months ended October 31, 2012, amortization expense of intangible assets was $98 and $292, respectively.