Acquired Intangible Assets

12 Months Ended

Jan. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets

4. 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 and related estimates of useful lives as of January 31, 2017:

	Useful Life (Years)	Cost		Accumulated Amortization			Net Book Value
Intellectual property	10	$	3,505	$	(1,811	)	$	1,694
Access to facilities contract	1		38		(38	)		—
Total		$	3,543	$	(1,849	)	$	1,694

The following table reflects the carrying value of intangible assets and related estimates of useful lives as of January 31, 2016:

	Useful Life (Years)	Cost		Accumulated Amortization			Net Book Value
Intellectual property	10	$	3,505	$	(1,461	)	$	2,044
Access to facilities contract	1		38		(38	)		—
Total		$	3,543	$	(1,499	)	$	2,044

Amortization expense of intangible assets was $350 for each of the fiscal years ended January 31, 2017, 2016 and 2015.

The following table presents the expected future amortization expense related to the Company’s acquired intangible assets for the next five fiscal years and thereafter as of January 31, 2017:

2018	$	351
2019		350
2020		351
2021		350
2022		292
	$	1,694