Business Combinations and Other Strategic Investments (Details) shares in Millions, SFr in Millions							3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 02, 2015 USD ($)	Jul. 22, 2014 CHF (SFr)	Jun. 27, 2014 USD ($)	Apr. 17, 2014 USD ($)	Sep. 30, 2011 USD ($)	Aug. 01, 2011 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($) shares	Oct. 24, 2014 shares
Business Acquisition [Line Items]
Acquisition-related costs							$ 136,000	$ 225,000	$ 333,000	$ 1,482,000
Bargain purchase gain							0	0	0	849,000
Aggregate cost method investment							130,000		130,000		$ 129,000
Maximum ownership interest for cost method investment (as a Percent)			20.00%
Available-for-sale securities							1,480,000		1,480,000		$ 5,941,000
Nicox [Member]
Business Acquisition [Line Items]
Shares received that were subject to certain lockup provisions (in shares) | shares													4.3
Number of shares soldl (in shares) | shares											1.1	0.2
Proceeds from sale of investment							6,000,000		6,000,000		$ 2,600,000	$ 600,000
Realized gain (loss) on sale							0		0		$ (200,000)
Unrealized holding loss on investment							100,000
Available-for-sale securities							1,500,000		1,500,000
Excelvision AG [Member]
Business Acquisition [Line Items]
Consideration for share purchase agreement	$ 28,400,000	SFr 21.7
Amount of cash paid	25,900,000
Acquisition-related costs							0	100,000
Bargain purchase gain	$ 900,000
Revenue from acquiree since acquisition							3,700,000	8,800,000	10,600,000	15,300,000
Aciex Agreement [Member]
Business Acquisition [Line Items]
Interests acquired through Preferred Stock Purchase Agreement					$ 2,000,000	$ 8,000,000
Aggregate cost method investment			$ 10,800,000
Aciex Agreement [Member] | Convertible Debt [Member]
Business Acquisition [Line Items]
Cash paid for Secured Note and Warrant Purchase Agreement			$ 400,000	$ 400,000
Other Individually Insignificant Product Acquisitions [Member]
Business Acquisition [Line Items]
Product licensing rights acquired							$ 2,400,000	$ 800,000	$ 3,400,000	$ 800,000