Note 6. Financial Statement Components

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

	At
	March 31, 2018			December 30, 2017
Inventories:
Raw materials and sub-assemblies	$	29,781		$	32,187
Work in process		15,781			13,498
Finished goods		7,548			7,175
Inventories		53,110			52,860
Inventories-delivered systems		1,493			1,534
Total inventories	$	54,603		$	54,394

Property, plant and equipment, net:⁽¹⁾
Land	$	15,573		$	15,573
Building and improvements		21,212			20,880
Machinery and equipment		39,629			36,380
Furniture and fixtures		2,470			2,420
Software		9,584			9,558
Capital in progress		1,502			4,418
Total property, plant and equipment, gross		89,970			89,229
Accumulated depreciation and amortization		(46,175	)		(44,419	)
Total property, plant and equipment, net	$	43,795		$	44,810
⁽¹⁾Total depreciation and amortization expense was $1.7 million and $1.8 million for the three months ended March 31, 2018 and April 1, 2017, respectively.
Other Current Liabilities:
Accrued warranty	$	4,643		$	4,863
Accrued taxes		721			813
Accrued professional services		470			534
Other		1,286			1,039
Total other current liabilities	$	7,120		$	7,249

Components of Accumulated Other Comprehensive Income (Loss)

	Foreign Currency Translations			Defined Benefit Pension Plans			Unrealized (Loss) on Investment			Accumulated Other Comprehensive Income
Balance as of December 30, 2017	$	(1,647	)	$	(387	)	$	(90	)	$	(2,124	)
Current period change		1,987			—			(89	)		1,898
Balance as of March 31, 2018	$	340		$	(387	)	$	(179	)	$	(226	)

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