8. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of the periods indicated (in thousands):

Inventories

	April 1, 2016		December 31, 2015
Raw materials	$	37,486	$	38,511
Work-in-process		12,438		10,138
Finished goods		11,146		9,266
Demo and consigned inventory		694		1,651
Total inventories	$	61,764	$	59,566

Accrued Expenses and Other Current Liabilities

	April 1, 2016		December 31, 2015
Accrued compensation and benefits	$	7,741	$	7,357
Accrued warranty		3,248		3,335
Accrued restructuring		2,383		1,652
Accrued contingent considerations		2,901		—
Accrued professional services fees and other		8,001		8,838
Total	$	24,274	$	21,182

Accrued Warranty

	Three Months Ended
	April 1, 2016			April 3, 2015
Balance at beginning of the period	$	3,335		$	3,044
Provision charged to cost of revenue		310			429
Acquisition related warranty accrual		—			94
Use of provision		(393	)		(342	)
Reclassification to liabilities held for sale		—			(376	)
Foreign currency exchange rate changes		(4	)		(24	)
Balance at end of period	$	3,248		$	2,825

Other Long Term Liabilities

	April 1, 2016		December 31, 2015
Capital lease obligations	$	8,955	$	9,173
Accrued pension liabilities		3,287		3,693
Accrued contingent considerations		988		3,889
Other		2,515		2,690
Total	$	15,745	$	19,445