Composition of Certain Financial Statement Captions

The following tables present detailed information from our consolidated balance sheets as of April 1, 2016 and September 25, 2015 (amounts displayed in thousands, except as otherwise noted).

Accounts Receivable



Accounts Receivable, Net	April 1, 2016			September 25, 2015
Trade accounts receivable	$	87,114		$	94,559
Accounts receivable from patent administration program customers	17,634			8,546
Accounts receivable, gross	104,748			103,105
Less: allowance for doubtful accounts	(2,665		)	(1,542		)
Total	$	102,083		$	101,563

Inventories



Inventories	April 1, 2016		September 25, 2015
Raw materials	$	4,293	$	3,246
Work in process	5,628		3,279
Finished goods	7,338		7,347
Total	$	17,259	$	13,872

Inventories are stated at the lower of cost or market. Inventory with a consumption period expected to exceed twelve months is recorded within other non-current assets in our consolidated balance sheets. In addition to the amounts shown in the table above, we have included $1.5 million and $1.4 million of raw materials inventory within other non-current assets in our consolidated balance sheets as of April 1, 2016 and September 25, 2015, respectively. Based on anticipated inventory consumption rates, and aside from existing write-downs due to excess and obsolete inventory, we do not believe that material risk of obsolescence exists prior to ultimate sale.

Prepaid Expenses And Other Current Assets



Prepaid Expenses And Other Current Assets	April 1, 2016		September 25, 2015
Prepaid expenses	$	17,945	$	13,680
Other current assets	7,071		7,525
Income tax receivable	11,182		10,826
Total	$	36,198	$	32,031

Accrued Liabilities



Accrued Liabilities	April 1, 2016		September 25, 2015
Accrued royalties	$	2,156	$	1,951
Amounts payable to patent administration program partners	55,676		40,466
Accrued compensation and benefits	51,229		70,317
Accrued professional fees	4,274		6,523
Other accrued liabilities	45,199		50,050
Total	$	158,534	$	169,307

Other accrued liabilities include the accrual for unpaid PP&E additions of $13.2 million and $20.5 million as of April 1, 2016 and September 25, 2015, respectively.

Other Non-Current Liabilities



Other Non-Current Liabilities	April 1, 2016		September 25, 2015
Supplemental retirement plan obligations	$	2,418	$	2,400
Non-current tax liabilities	56,545		62,843
Other liabilities	11,701		11,781
Total	$	70,664	$	77,024