Financial Instruments (Details) - USD ($) $ in Thousands		Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Fair value of asset measured on a recurring basis
Fixed income available-for-sale securities		$ 11,996		$ 16,978
Contingent consideration			$ 0
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	4,321		2,305
Fixed income available-for-sale securities	[2]	0		0
Total		4,321		2,305
Contingent consideration		0		0
Total		0		0
Significant Other Observable Inputs (Level 2) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	0		0
Fixed income available-for-sale securities	[2]	13,401		18,379
Total		13,401		18,379
Contingent consideration		0		0
Total		0		0
Significant Unobservable Inputs (Level 3) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	0		0
Fixed income available-for-sale securities	[2]	0		0
Total		0		0
Contingent consideration		0		318
Total		0		318
Fair Value, Measurements, Recurring [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	4,321		2,305
Fixed income available-for-sale securities	[2]	13,401		18,379
Total		17,722		20,684
Contingent consideration		0		318
Total		$ 0		$ 318

[1] Included in cash and cash equivalents in the Company’s condensed consolidated balance sheets

[2] Represents the portfolio of available for sale securities that is included in restricted investments and short-term investments in the Company’s condensed consolidated balance sheets