Commitments and Contingencies (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended
	Oct. 31, 2014	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Litigation Settlement, Amount	$ 3,000		$ 2,800
Business Combination, Indemnification Assets, Amount as of Acquisition Date	$ 2,500
Payments for Legal Settlements			300
Settlement Liabilities, Current		$ 500	500	$ 500
Regulatory Liability, Noncurrent		$ 2,250	$ 2,250	2,500
Letters of Credit Outstanding, Amount				$ 1,400
Common Stock, Par Value		$ 0.01	$ 0.01	$ 0.01
RedPath Integrated Pathology, Inc [Member]
Business Acquisition [Line Items]
Adjustments to Additional Paid in Capital, Other		$ 6,100
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	500,000
Stock Issued During Period, Value, Treasury Stock Reissued		$ 6,100
Common Stock, Par Value		$ 0.0001	$ 0.0001