Financial Statement Components (Tables)

9 Months Ended

Sep. 30, 2017

The following tables provide details of selected financial statement components as of the following dates (in thousands):

	At
	September 30, 2017			December 31, 2016
Inventories:
Raw materials and sub-assemblies	$	31,772		$	23,506
Work in process		18,280			10,347
Finished goods		4,968			4,984
Inventories		55,020			38,837
Inventories-delivered systems		3,320			2,457
Total inventories	$	58,340		$	41,294

Property, plant and equipment, net:⁽¹⁾
Land	$	15,571		$	15,568
Building and improvements		20,649			20,532
Machinery and equipment		35,428			35,659
Furniture and fixtures		2,289			2,282
Software		9,261			9,756
Capital in progress		1,825			2,748
Total property, plant and equipment, gross		85,023			86,545
Accumulated depreciation and amortization		(42,706	)		(42,319	)
Total property, plant and equipment, net	$	42,317		$	44,226
⁽¹⁾Total depreciation and amortization expense was $1.6 million and $1.7 million for the three months ended September 30, 2017 and September 24, 2016, respectively, and $5.1 million for both nine months ended September 30, 2017 and September 24, 2016.
Other Current Liabilities:
Accrued warranty	$	4,542		$	3,838
Customer deposits		67			581
Retrofit liability		353			432
Accrued professional services		784			424
Accrued royalties		60			1,233
Other		1,898			1,539
Total other current liabilities	$	7,704		$	8,047

Components of Accumulated Other Comprehensive Income (Loss)

	Foreign Currency Translations			Defined Benefit Pension Plans			Unrealized Income (Loss) on Investment			Accumulated Other Comprehensive Income
Balance as of December 31, 2016	$	(5,817	)	$	(227	)	$	(2	)	$	(6,046	)
Current period change		3,470			—			(2	)		3,468
Balance as of September 30, 2017	$	(2,347	)	$	(227	)	$	(4	)	$	(2,578	)