SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property & Equipment and Patent Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Property and equipment
Depreciation expense	$ 7,600	$ 3,700	$ 1,400
Assets under construction	8,038	1,552
Impairment of long-lived assets	0	0	0
Allowance for Doubtful Accounts
Allowance for doubtful accounts	275	86	0
Net additions charged to revenue	$ 189	86	$ 0
Software Capitalization Policy
Software development stages | item	3
Patent Costs and Intangible Assets
Accrued liabilities	$ 22,253	$ 13,960
Amortization of intangible assets	$ 150
MDx Health | Licensed Intellectual Property
Patent Costs and Intangible Assets
Estimated useful life	10 years
Intangible asset, net	$ 1,800
Accrued liabilities	2,000
Amortization of intangible assets	$ 200
Laboratory equipment | Minimum
Property and equipment
Estimated Useful Life	3 years
Laboratory equipment | Maximum
Property and equipment
Estimated Useful Life	5 years
Furniture and fixtures
Property and equipment
Estimated Useful Life	3 years
Computer equipment and computer software
Property and equipment
Estimated Useful Life	3 years
Buildings
Property and equipment
Estimated Useful Life	30 years
Leasehold Improvements
Property and equipment
Assets under construction	$ 1,700
Building and leasehold improvements
Property and equipment
Assets under construction	5,100
Expected cost to complete construction of project	$ 1,200