Business Combination - Allocation of Assets acquired, liabilites assumed and Purchase price (Details) - USD ($) $ in Thousands			3 Months Ended
	Apr. 16, 2015	Jan. 02, 2015	Mar. 31, 2016	Dec. 31, 2015
Liabilities assumed:
Goodwill			$ 1,115	$ 1,115
Tunable Laser Product Lines From EMCORE Corporation [Member]
Total purchase consideration:
Cash paid		$ 1,500	1,500
Notes payable	$ 15,500	16,000	15,482
Total consideration	$ 17,000	$ 17,500	16,982
Fair value of assets acquired:
Accounts receivable			9,274
Inventories			1,693
Prepaid expenses and other current assets			670
Property, plant and equipment			6,917
Intangible assets acquired:
Intangible assets acquired			4,800
Fair value of assets acquired			23,354
Liabilities assumed:
Accounts payable			(7,427)
Accrued liabilities			(60)
Fair value of liabilities assumed total			(7,487)
Goodwill			$ 1,115
Tunable Laser Product Lines From EMCORE Corporation [Member] | Developed Technology [Member]
Fair value of assets acquired:
Useful Life (in years)			7 years
Intangible assets acquired:
Intangible assets acquired			$ 4,100
Tunable Laser Product Lines From EMCORE Corporation [Member] | Customer relationships
Fair value of assets acquired:
Useful Life (in years)			2 years
Intangible assets acquired:
Intangible assets acquired			$ 700