Intangible assets

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

	April 29, 2017
	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	)	$	(53,266	)	$	7,547		7.3
Customer relationships		54,505		(30,486	)		(21,033	)		2,986		5.5
Trademarks and other		4,078		-			(3,888	)		190		1.7
Purchased IP - amortizing		35,964		(5,516	)		(24,104	)		6,344		2.4
Total amortizing		179,974		(60,616	)		(102,291	)		17,067		5.1
Purchased IP - not yet deployed		18,133		(7,446	)		-			10,687
Total intangibles	$	198,107	$	(68,062	)	$	(102,291	)	$	27,754

	January 28, 2017
	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	)	$	(52,854	)	$	7,959		7.4
Customer relationships		54,505		(30,486	)		(20,897	)		3,122		5.8
Trademarks and other		4,078		-			(3,858	)		220		1.9
Purchased IP - amortizing		36,007		(5,516	)		(23,057	)		7,434		2.3
Total amortizing		180,017		(60,616	)		(100,666	)		18,735		5.0
Purchased IP - not yet deployed		16,449		(4,440	)		-			12,009
Total intangibles	$	196,466	$	(65,056	)	$	(100,666	)	$	30,744

Acquired intangible assets represent intangible assets acquired through business combinations. Purchased intellectual property (“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 IP 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 IP is incorporated. The table above includes, as of

April 29, 2017,

purchased IP

not

yet deployed of

$0.8

million, which represents our share of the cost incurred in connection with the collaborative arrangement discussed in Note

11.

As part of our restructuring plan as discussed in Note

we recorded an impairment charge of

$3.0

million for purchased IP

not

yet deployed for the

three

months ended

April 29, 2017.

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

	Three Months Ended
	April 29 , 201 7		April 30 , 201 6
Cost of revenue	$	1,173	$	2,053
Operating expenses		447		717
Total intangibles amortization expense	$	1,620	$	2,770

As of

April 29, 2017,

we expect amortization expense in future periods to be as follows (in thousands):

Fiscal year	Total
2018 (remaining nine months)	$	4,053
2019		4,318
2020		2,833
2021		1,588
2022		1,243
Thereafter		3,032
Total	$	17,067