Business Combination (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Apr. 16, 2015	Jan. 02, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Acquisition-related costs			$ 180		$ 467
Revenue			83,560	$ 81,576	250,316	$ 227,195
Tunable Laser Product Lines From EMCORE Corporation [Member]
Business Acquisition [Line Items]
Total consideration	$ 17,000	$ 17,500
Cash consideration paid		1,500
Issuance of notes to the seller of acquired business	$ 15,500	$ 16,000
Acquisition-related costs					900
Tunable Laser Product Lines From EMCORE Corporation [Member] | Net Accounts Receivable [Member]
Business Acquisition [Line Items]
Reduction in Assumed Assets & Liabilities					200
Tunable Laser Product Lines From EMCORE Corporation [Member] | Net Inventories [Member]
Business Acquisition [Line Items]
Reduction in Assumed Assets & Liabilities					100
Tunable Laser Product Lines From EMCORE Corporation [Member] | Sales Tax Accrual [Member]
Business Acquisition [Line Items]
Reduction in Assumed Assets & Liabilities					100
EMCORE [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Acquisition-related costs					300	300
Revenue			$ 13,200		39,500
EMCORE [Member] | Intersegment Eliminations [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Revenue					$ 0	$ 0