Litigation (Details) - Positive Outcome of Litigation [Member] $ in Thousands				9 Months Ended
	Feb. 04, 2016 USD ($) Patent	Feb. 26, 2013 USD ($)	Nov. 06, 2012 USD ($) Patent	Sep. 30, 2016 USD ($) Patent Lawsuit
Gain Contingencies [Line Items]
Number of intellectual property infringement lawsuits pending | Lawsuit				5
Amount of damages awarded in patent infringement case	$ 625,600		$ 368,000	$ 302,400
Number of patents allegedly infringed upon by Apple, Inc. | Patent	4		4	4
Amount of interest payment awarded up to final judgment, per day		$ 34
Amount of damage infringement payment awarded up to final judgment, per day		$ 330