Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Revenue, Gross Profit, Operating Income (Loss), Depreciation and Amortization Expenses, Accounts Receivable and Inventory by Reportable Segments

Revenue, gross profit, operating income (loss), depreciation and amortization expenses, accounts receivable and inventories by reportable segments are as follows (in thousands):

	Year Ended December 31,
	2018		2017		2016
Revenue
Photonics	$	249,339	$	232,359	$	174,158
Vision		232,902		183,074		122,250
Precision Motion		132,096		105,857		88,350
Total	$	614,337	$	521,290	$	384,758

	Year Ended December 31,
	2018			2017			2016
Gross Profit
Photonics	$	117,109		$	106,117		$	76,696
Vision		87,198			69,249			47,181
Precision Motion		59,477			46,564			40,044
Unallocated Corporate and Shared Services		(2,256	)		(1,399	)		(1,469	)
Total	$	261,528		$	220,531		$	162,452

	Year Ended December 31,
	2018			2017			2016
Operating Income (Loss)
Photonics	$	59,285		$	51,660		$	35,217
Vision		8,991			7,883			(1,277	)
Precision Motion		31,674			27,146			21,101
Unallocated Corporate and Shared Services		(28,937	)		(29,123	)		(22,086	)
Total	$	71,013		$	57,566		$	32,955

	Year Ended December 31,
	2018		2017		2016
Depreciation and Amortization Expenses
Photonics	$	12,042	$	13,806	$	6,738
Vision		20,657		13,590		10,402
Precision Motion		3,627		2,308		2,439
Unallocated Corporate and Shared Services		726		1,054		1,394
Total	$	37,052	$	30,758	$	20,973

	December 31,
	2018		2017
Accounts Receivable
Photonics	$	31,536	$	33,490
Vision		34,414		36,089
Precision Motion		18,005		11,903
Total accounts receivable	$	83,955	$	81,482
Inventories
Photonics		41,623		44,451
Vision		42,498		33,836
Precision Motion		20,643		12,991
Total inventories	$	104,764	$	91,278
Total segment assets	$	188,719	$	172,760

	December 31,
	2018		2017
Total Assets
Total segment assets	$	188,719	$	172,760
Cash and cash equivalents		82,043		100,057
Prepaid income taxes and income taxes receivable		1,852		4,387
Prepaid expenses and other current assets		9,155		10,675
Property, plant and equipment, net		65,464		61,718
Deferred tax assets		9,492		7,052
Other assets		2,269		4,018
Intangible assets, net		142,920		155,048
Goodwill		217,662		210,988
Total	$	719,576	$	726,703

Schedule of Geographic Revenue

The Company aggregates geographic revenue based on the customer location where products are shipped. Revenue from these customers is as follows (in thousands, except percentage data):

	Year Ended December 31,
	2018					2017					2016
	Revenue		% of Total			Revenue		% of Total			Revenue		% of Total
United States	$	242,243		39.4	%	$	220,583		42.3	%	$	154,756		40.2	%
Germany		88,027		14.3			68,003		13.0			55,940		14.5
Rest of Europe		105,608		17.2			81,001		15.5			51,705		13.4
China		66,414		10.8			56,128		10.8			44,225		11.5
Rest of Asia-Pacific		104,300		17.0			84,727		16.3			60,104		15.6
Other		7,745		1.3			10,848		2.1			18,028		4.8
Total	$	614,337		100.0	%	$	521,290		100.0	%	$	384,758		100.0	%

Summary of Long-lived Assets

Long-lived assets consist of property, plant and equipment, net, and are aggregated based on the location of the assets. A summary of these long-lived assets is as follows (in thousands):

	December 31,
	2018		2017
United States	$	32,029	$	29,920
Europe		31,696		30,621
China		1,636		1,127
Rest of Asia-Pacific		103		50
Total	$	65,464	$	61,718

Revenue By End Market

The Company primarily operates in two end markets: the advanced industrial market and the medical market. Revenue by end market was approximately as follows:

	Year Ended December 31,
	2018			2017			2016
Advanced Industrial		50	%		50	%		60	%
Medical		50	%		50	%		40	%
Total		100	%		100	%		100	%