Note 6. Financial Statement Components

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

	At
	December 30, 2017			December 31, 2016
Inventories:
Raw materials and sub-assemblies	$	32,187		$	23,506
Work in process		13,498			10,347
Finished goods		7,175			4,984
Inventories		52,860			38,837
Inventories-delivered systems		1,534			2,457
Total inventories	$	54,394		$	41,294

Property, plant and equipment, net:⁽¹⁾
Land	$	15,573		$	15,568
Building and improvements		20,880			20,532
Machinery and equipment		36,380			35,659
Furniture and fixtures		2,420			2,282
Software		9,558			9,756
Capital in progress		4,418			2,748
Total property, plant and equipment, gross		89,229			86,545
Accumulated depreciation and amortization		(44,419	)		(42,319	)
Total property, plant and equipment, net	$	44,810		$	44,226
⁽¹⁾ Total depreciation and amortization expense for the years ended December 30, 2017, December 31, 2016 and December 26, 2015 was $6.7 million, $6.8 million, and $6.9 million, respectively.
Other Current Liabilities:
Accrued warranty	$	4,863		$	3,838
Accrued taxes		813			706
Customer deposits		—			581
Accrued professional services		534			424
Accrued royalties		—			1,233
Other		1,039			1,265
Total other current liabilities	$	7,249		$	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 26, 2015	$	(4,948	)	$	(210	)	$	(44	)	$	(5,202	)
Current period change		(869	)		(17	)		42			(844	)
Balance as of December 31, 2016		(5,817	)		(227	)		(2	)		(6,046	)
Current period change		4,170			(160	)		(88	)		3,922
Balance as of December 30, 2017	$	(1,647	)	$	(387	)	$	(90	)	$	(2,124	)

The items above, except for unrealized income (loss) on investment, did not impact the Company’s income tax provision. The amounts reclassified from each component of accumulated other comprehensive income into income statement line items were insignificant.