Business Combination (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended			4 Months Ended	9 Months Ended
	Jan. 02, 2015	Nov. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Apr. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Acquisition [Line Items]
Acquisition-related costs			$ 148	$ 180			$ 923	$ 467
Revenue			103,312	83,560			301,586	250,316
Tunable Laser Product Lines From EMCORE Corporation [Member]
Business Acquisition [Line Items]
Total consideration	$ 17,500					$ 16,982
Cash consideration paid	1,500					1,500
Issuance of notes to the seller of acquired business	$ 16,000					$ 15,482
Acquisition-related costs								900
Tunable Laser Product Lines From EMCORE Corporation [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Acquisition-related costs			0				0	300
Revenue			20,200	$ 13,200			58,300	39,500
Tunable Laser Product Lines From EMCORE Corporation [Member] | Intersegment Eliminations [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Revenue			$ 0		$ 0		$ 0	$ 0
EigenLight Corporation
Business Acquisition [Line Items]
Cash consideration paid		$ 400