Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 28, 2015	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2015 EUR (€)	Apr. 29, 2014 USD ($)	Apr. 29, 2014 EUR (€)
Commitment And Contingencies [Line Items]
Capital lease agreement term for information technology equipment	30 months
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2015			$ 32,000
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2016			157,000
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2017			$ 160,000
Future minimum lease payments borrowing rate			1.64%
Present Value Of Net Minimum Lease Payments At Inception Of Lease			$ 9,000
Capital Lease Obligations, Current			142,000
Capital lease obligation			$ 201,000
Extended lease term			Apr. 30, 2020
Provisions for tenant improvement allowance, maximum			$ 398,000
Future minimum lease obligations, for the year ended December 31, 2015			178,000
Future minimum lease obligations, for the year ended December 31, 2016			694,000
Future minimum lease obligations, for the year ended December 31, 2017			651,000
Future minimum lease obligations, for the year ended December 31, 2018 and thereafter			1,500,000
Purchase commitments pending			11,000,000
Litigation Settlement Amount Receivable Non-Current			825,000
Receivable For Legal Settlements On First Anniversary			275,000
Receivable For Legal Settlements On Second Anniversary			275,000
Receivable For Legal Settlements On Third Anniversary			275,000
Litigation Settlement Amount Receivable Current			550,000
Litigation Settlement Receivable			1,400,000
Litigation Expense Recovered		$ 0	731,000
Settlement Expense For Dismissal of Patent Infringement Lawsuit Recovered			68,000
Legal settlement at present value			$ 1,200,000
Foregoing litigation settlement, description			As part of the settlement, Fotona agreed to pay the Company a total of $1.4 million, with $550,000 payable within 10 days of March 24, 2015 and the remaining, $825,000 payable in three increments of $275,000 each to be paid no later than the first, second, and third anniversary of the effective date of the agreement.
Statutory Bond
Commitment And Contingencies [Line Items]
Amount of injunction bond to be posted | €				€ 146,000
Licensing Agreements United States
Commitment And Contingencies [Line Items]
License period			3 years
Licensing Agreements Outside of United States
Commitment And Contingencies [Line Items]
License period			5 years
Settled Litigation
Commitment And Contingencies [Line Items]
Deferred revenue					$ 379,000
Employee Arrangements and Other Compensation
Commitment And Contingencies [Line Items]
Change in control, if occurs, may require severance benefits payable			$ 1,600,000
Accrued for performance bonuses			$ 198,000
Surety Bond
Commitment And Contingencies [Line Items]
Amount of injunction bond to be posted | €						€ 500,000