Financial Instruments (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 financial liabilities ending balance		$ 318	$ 318	$ 968	$ 0
Fair value of asset measured on a recurring basis
Fixed income available-for-sale securities		16,978	16,978	30,230
Business Combination, Contingent Consideration, Liability		318	318	968		$ 925
Adjustment to contingent consideration		(577)	(650)	43	$ 0
Decrease in contingent consideration liability due to performance targets			(759)
Amortization of contingent consideration			109
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	2,305	2,305	9,023
Fixed income available-for-sale securities	[2]	0	0	0
Business Combination, Contingent Consideration, Liability		0	0	0
Liabilities, Fair Value Disclosure, Recurring		0	0	0
Assets, Fair Value Disclosure, Recurring		2,305	2,305	9,023
Significant Other Observable Inputs (Level 2) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	0	0	0
Fixed income available-for-sale securities	[2]	18,379	18,379	30,230
Business Combination, Contingent Consideration, Liability		0	0	0
Liabilities, Fair Value Disclosure, Recurring		0	0	0
Assets, Fair Value Disclosure, Recurring		18,379	18,379	30,230
Significant Unobservable Inputs (Level 3) [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	0	0	0
Fixed income available-for-sale securities	[2]	0	0	0
Business Combination, Contingent Consideration, Liability		318	318	968
Liabilities, Fair Value Disclosure, Recurring		318	318	968
Assets, Fair Value Disclosure, Recurring		0	0	0
Fair Value, Measurements, Recurring [Member]
Fair value of asset measured on a recurring basis
Money market funds	[1]	2,305	2,305	9,023
Fixed income available-for-sale securities	[2]	18,379	18,379	30,230
Liabilities, Fair Value Disclosure, Recurring		318	318	968
Assets, Fair Value Disclosure, Recurring		$ 20,684	$ 20,684	$ 39,253

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

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