6. Intangible assets

The tables below present the balances of our intangible assets (in thousands, except for years):

	May 2, 2015
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	76,628	$	(24,614	)	$	(45,666	)	$	6,348		1.8
Customer relationships		50,704		(30,486	)		(18,593	)		1,625		1.5
Trademarks and other		5,478		-			(5,051	)		427		3.7
Purchased IP - amortizing		23,442		(5,516	)		(16,125	)		1,801		1.0
Total amortizing		156,252		(60,616	)		(85,435	)		10,201		1.7
Purchased IP - not yet deployed		16,716		(3,727	)		-			12,989
Total intangibles	$	172,968	$	(64,343	)	$	(85,435	)	$	23,190

	January 31, 2015
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	76,628	$	(24,614	)	$	(44,604	)	$	7,410		2.0
Customer relationships		50,704		(30,486	)		(18,313	)		1,905		1.7
Trademarks and other		4,078		-			(3,621	)		457		3.9
Purchased IP - amortizing		23,398		(5,516	)		(15,162	)		2,720		1.0
Total amortizing		154,808		(60,616	)		(81,700	)		12,492		1.8
Purchased IP - not yet deployed		15,877		(3,727	)		-			12,150
Total intangibles	$	170,685	$	(64,343	)	$	(81,700	)	$	24,642

Acquired intangible assets represent intangible assets acquired through business combinations. Purchased intellectual property (“Purchased IP”) represents intangible assets acquired through direct purchases of licensed technology from vendors which is incorporated into our products.

Purchased IP – not yet deployed relates to Purchased IP from third parties for our products that are currently in development. We begin amortizing such intellectual property upon the earlier of the beginning of the term of the license agreement, as appropriate, or at the time we begin shipment of the associated products into which such intellectual property is incorporated.

The following table presents the amortization of intangible assets in the accompanying condensed consolidated statements of operations (in thousands):

	Three Months Ended
	May 2 , 201 5		May 3 , 201 4
Cost of revenue	$	2,006	$	1,946
Operating expenses		353		354
Total intangibles amortization expense	$	2,359	$	2,300

As of May 2, 2015, we expect amortization expense in future periods to be as follows (in thousands):

Fiscal year	Total
2016 (remaining nine months)	$	5,135
2017		4,253
2018		710
2019		103
Total	$	10,201