7. Intangible assets

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

	April 30, 2016
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	85,429	$	(24,614	)	$	(50,041	)	$	10,774		6.8
Customer relationships		54,505		(30,486	)		(19,962	)		4,057		5.7
Trademarks and other		4,078		-			(3,769	)		309		2.7
Purchased IP - amortizing		34,067		(5,516	)		(19,823	)		8,728		2.7
Total amortizing		178,079		(60,616	)		(93,595	)		23,868		5.0
Purchased IP - not yet deployed		15,026		(4,140	)		-			10,886
Total intangibles	$	193,105	$	(64,756	)	$	(93,595	)	$	34,754

	January 30, 2016
	Gross Value		Impairment			Accumulated Amortization and Effect of Currency Translation			Net Value		Weighted Average Remaining Amortization Period (Years)
Acquired intangible assets:
Developed technology	$	85,427	$	(24,614	)	$	(48,824	)	$	11,989		6.5
Customer relationships		54,505		(30,486	)		(19,557	)		4,462		5.7
Trademarks and other		4,078		-			(3,739	)		339		2.9
Purchased IP - amortizing		32,838		(5,516	)		(18,696	)		8,626		2.9
Total amortizing		176,848		(60,616	)		(90,816	)		25,416		5.1
Purchased IP - not yet deployed		15,774		(4,140	)		-			11,634
Total intangibles	$	192,622	$	(64,756	)	$	(90,816	)	$	37,050

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
	April 30 , 201 6		May 2 , 201 5
Cost of revenue	$	2,053	$	2,006
Operating expenses		717		353
Total intangibles amortization expense	$	2,770	$	2,359

As of April 30, 2016, we expect amortization expense in future periods to be as follows (in thousands):

Fiscal year	Total
2017 (remaining nine months)	$	6,729
2018		5,131
2019		3,213
2020		2,931
2021		1,588
Thereafter		4,276
Total	$	23,868