Supplemental financial information

Inventory consists of the following (in thousands):

	April 29 , 201 7		January 28 , 201 7
Wafers and other purchased materials	$	10,944	$	8,595
Work-in-process		3,025		2,780
Finished goods		4,896		6,772
Total inventory	$	18,865	$	18,147

Prepaid expenses and other current assets consist of the following (in thousands):

	April 29 , 201 7		January 28 , 201 7
Prepayments for taxes	$	3,444	$	3,421
Non-operating receivable		742		955
Prepayments for royalties		905		776
Other current assets		2,962		2,865
Total prepaid expenses and other current assets	$	8,053	$	8,017

Software, equipment and leasehold improvements consist of the following (in thousands, except for years):

	Estimated Useful Lives ( Y ears)				April 29 , 201 7			January 28 , 201 7
Software		3	-	5	$	49,999		$	49,915
Mask sets			3			21,255			18,209
Equipment			3			8,021			7,719
Office equipment and furniture		3	-	5		7,918			7,857
Leasehold improvements		1	-	5		2,129			2,108
Total						89,322			85,808
Less: Accumulated depreciation and amortization						(69,942	)		(67,285	)
Total software, equipment and leasehold improvements, net					$	19,380		$	18,523

The table above includes, as of

April 29, 2017,

mask sets, net of amortization, of

$2.6

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

11.

Software, equipment and leasehold improvement depreciation and amortization expense for the

three

months ended

April 29, 2017

and

April 30, 2016

was

$2.7

million and

$3.4

million, respectively.

Accrued liabilities consist of the following (in thousands):

	April 29 , 201 7		January 28 , 201 7
License fees	$	4,669	$	5,578
Income taxes payable, current portion		2,533		2,094
Rebates		1,852		1,585
Royalties		1,713		1,378
Warranty		727		783
Deferred revenue		460		350
Other accrued liabilities		3,409		1,839
Total accrued liabilities	$	15,363	$	13,607

The following table summarizes activity related to accrued rebates (in thousands):

	Three months ended April 29, 2017
Beginning balance	$	1,585
Charged as a reduction of revenue		725
Payments		(458	)
Ending balance	$	1,852