Discontinued Operations and Divestitures - Additional Information (Details) - USD ($)		1 Months Ended	9 Months Ended
	Apr. 15, 2015	Jul. 31, 2014	Oct. 02, 2015	Jun. 30, 2015	Dec. 31, 2014
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs			$ 29,570,000
Assets of discontinued operations			0		$ 631,000
Liabilities of discontinued operations			0		$ 324,000
Ownership in joint venture, Excel Laser Technology Private Limited
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Minority interest ownership percentage				50.00%
Ownership in joint venture, Excel Laser Technology Private Limited | Maximum
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale of business			(100,000)
JK Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs	$ 29,600,000
Pre-tax gain (loss) on sale of business			$ 19,600,000
Scientific Lasers Business
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of transaction costs		$ 6,500,000
Sale proceeds held in escrow		$ 1,500,000
Sale proceeds held in escrow, Period			2016-01