Commitments and Contingencies (Details) ft² in Thousands, € in Millions							1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 16, 2017 USD ($)	Jun. 01, 2017 USD ($) ft²	Dec. 27, 2016 USD ($)	Mar. 23, 2015 EUR (€)	Mar. 23, 2015 USD ($)	Sep. 16, 2013 USD ($)	Sep. 30, 2027 USD ($)	Apr. 30, 2017 USD ($)	Sep. 30, 2016 ft²	Aug. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2010 claim defendant	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Operating leases, future minimum payments due											$ 32,800,000		$ 32,800,000
Rent expense											1,300,000	$ 500,000	2,300,000	$ 1,100,000
Operating leases, future minimum, sublease receipts											1,000,000		$ 1,000,000
Number of defendants | defendant																	4
Payment for legal settlement								$ 250,000
Area of office lease | ft²		39							64
Office lease term, months		123 months											129 months
Office lease, monthly rental rate		$ 41,388											$ 144,000
Other Liabilities Noncurrent Other											3,365,000		$ 3,365,000			$ 1,155,000
Office and laboratory lease period free of charge													9 months
Amount of contribution																18,800,000
Expected Costs to Transfer Product Line										$ 100,000
Penalty payment derivative											400,000		$ 400,000			400,000
Revenue											73,214,000	$ 99,129,000	144,902,000	$ 198,274,000
Additional paid-in capital											539,525,000		539,525,000			$ 532,378,000
Restoration Costs Upon Lease Termination											3,100,000		3,100,000
Rusnano
Commitments And Contingencies Disclosure [Line Items]
Other non-current liability											0		0
Finisar Corp
Commitments And Contingencies Disclosure [Line Items]
Loss Contingency, Pending Claims, Number | claim																	2
Lestina International Ltd. litigation
Commitments And Contingencies Disclosure [Line Items]
Damages sought, value			$ 3,000,000
APAT Arbitration
Commitments And Contingencies Disclosure [Line Items]
Damages sought, value	$ 1,500,000
Maximum
Commitments And Contingencies Disclosure [Line Items]
Office lease, monthly rental rate													194,000
Pending Litigation | Laser 2000 case
Commitments And Contingencies Disclosure [Line Items]
Partial settlement of claims						$ 492,000
Accrual for estimated net litigation expense				€ 1	$ 1,100,000
Litigation liability accrued																			$ 300,000
Embedded Derivative Financial Instruments [Member] | Maximum
Commitments And Contingencies Disclosure [Line Items]
Other non-current liability																		$ 5,000,000
Indemnification agreement
Commitments And Contingencies Disclosure [Line Items]
Payment for legal settlement													0
Lease termination
Commitments And Contingencies Disclosure [Line Items]
Other Liabilities Noncurrent Other											700,000		700,000
Scenario, Forecast
Commitments And Contingencies Disclosure [Line Items]
Office lease, monthly rental rate							$ 72,525
Scenario, Forecast | RUSSIAN FEDERATION
Commitments And Contingencies Disclosure [Line Items]
Exit fees for future															$ 2,000,000
Private Placement [Member] | Performance Guarantee [Member]
Commitments And Contingencies Disclosure [Line Items]
Other non-current liability											$ 30,000,000		$ 30,000,000