Acquisitions, Goodwill and Acquired Intangible Assets (Details) - USD ($) $ in Thousands		2 Months Ended	12 Months Ended
	Nov. 12, 2015	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Goodwill		$ 13,074	$ 13,074	$ 7,702	$ 7,702
Total consideration transferred					11,265
Goodwill and intangible assets [Abstract]
Finite-Lived Intangible Assets, Net		2,093	2,093
Impairment - IPR&D			0	(2,676)	(919)
Impairment - Goodwill			0	0
Goodwill		13,074	13,074	7,702	7,702
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Finite-Lived Intangible Assets, Gross		2,120	2,120
Finite-Lived Intangible Assets, Accumulated Amortization		27	27
Finite-Lived Intangible Assets, Net		2,093	$ 2,093
Finite-Lived Intangible Asset, Useful Life			10 years
Molecular Insight Pharmaceuticals Inc [Member]
Goodwill and intangible assets [Abstract]
Finite-Lived Intangible Assets, Net				0	19
Amortization of finite-lived intangible assets				(3)
Impairment of Intangible Assets, Finite-lived				(16)
Indefinite-Lived Intangible Assets (Excluding Goodwill)		$ 28,700	$ 28,700	28,700	31,360
Impairment - IPR&D				(2,660)
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Finite-Lived Intangible Assets, Net				0	$ 19
Exini [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	92.45%	96.81%	96.81%
Business Acquisition, Transaction Costs		$ 391	$ 391
Business Acquisition Contributed Revenue		76
Business Acquisition Contributed Net Loss		210
Fair Value Inputs, Discount Rate	3.50%
Fair Value Measurements, Valuation Techniques	Replacement cost
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]
Cash and cash equivalents	$ 7
Accounts receivable	18
Other current assets	108
Fixed assets	22
Accounts payable and accrued expenses	(807)
Other current liabilities	(127)
Intangible assets - technology	2,120
Total identifiable net assets	1,341
Noncontrolling interests	(504)
Goodwill	5,372
Total consideration transferred	6,209
Goodwill and intangible assets [Abstract]
Finite-Lived Intangible Assets, Net		2,093	2,093
Amortization of finite-lived intangible assets				(27)
Impairment of Intangible Assets, Finite-lived				$ 0
Intangible Assets Acquired During Period			2,120
Impairment - IPR&D			0
Goodwill, Acquired During Period			5,372
Goodwill	$ 5,372
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Finite-Lived Intangible Assets, Gross		2,120	2,120
Finite-Lived Intangible Assets, Accumulated Amortization		27	27
Finite-Lived Intangible Assets, Net		$ 2,093	$ 2,093