Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2014
Fair value of asset measured on a recurring basis
Fixed income available-for-sale securities		$ 16,993	$ 16,978
Contingent consideration		0	318	$ 925
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	2,315	2,305
Fixed income available-for-sale securities	[2]	0	0
Total		2,315	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]	18,394	18,379
Total		18,394	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]	2,315	2,305
Fixed income available-for-sale securities	[2]	18,394	18,379
Total		20,709	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