Subsequent Events (Details) - USD ($) $ in Thousands					1 Months Ended	3 Months Ended
	Mar. 24, 2017	Mar. 02, 2017	Oct. 03, 2016	Jul. 01, 2016	Apr. 30, 2017	Mar. 27, 2017
Series A Preferred Stock
Subsequent Event [Line Items]
Value of shares redeemed			$ 200	$ 2,600
Number of shares redeemed (in shares)			1,212	17,286
Reduction in the original recorded value of preferred stock			$ 100	$ 1,700
Reduction in the accretive value of the preferred stock			$ 100	$ 900
Series A Preferred Stock | Forecast
Subsequent Event [Line Items]
Value of shares redeemed					$ 3,900
Number of shares redeemed (in shares)					23,469
Reduction in the original recorded value of preferred stock					$ 2,400
Reduction in the accretive value of the preferred stock					$ 1,500
Subsequent Event | Series A Preferred Stock
Subsequent Event [Line Items]
Value of shares redeemed						$ 3,300
Number of shares redeemed (in shares)						20,303
Reduction in the original recorded value of preferred stock						$ 2,000
Reduction in the accretive value of the preferred stock						$ 1,300
Veracode, Inc, | Licensing Agreements | Subsequent Event
Subsequent Event [Line Items]
Sale of patent in license agreement		$ 2,000
Avast Software s.r.o. | Subsequent Event | Finjan, Inc. v. Avast Software s.r.o.
Subsequent Event [Line Items]
Proceeds from Legal Settlements	$ 7,745