Acquisitions (Details Textual) (USD $)			0 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Sep. 19, 2012 BlueGnome [Member]	Jan. 10, 2011 Epicentre [Member] years	Apr. 30, 2010 Helixis Inc [Member]	Jul. 28, 2010 Development stage entity 1 [Member]	Sep. 19, 2012 Developed Technology Rights [Member] BlueGnome [Member]	Jan. 10, 2011 Developed Technology Rights [Member] Epicentre [Member]	Sep. 19, 2012 Trade Names [Member] BlueGnome [Member]	Jan. 10, 2011 Trade Names [Member] Epicentre [Member]	Sep. 19, 2012 Customer Relationships [Member] BlueGnome [Member]	Jan. 10, 2011 Customer Relationships [Member] Epicentre [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business acquisition total consideration			$ 95,500,000	$ 71,400,000	$ 86,700,000	$ 22,000,000
Business acquisition net cash consideration			88,000,000	59,400,000	70,000,000
Fair value of contingent consideration to be settled in cash			7,500,000	7,400,000	14,100,000
Contingent consideration payments, maximum			20,000,000	15,000,000	35,000,000
Discount rate for assessment of the acquisition date fair value			30.00%	21.00%		28.00%
Maximum contingent compensation			20,000,000
Total consideration to tangible assets, net of liabilities			11,200,000	900,000	2,300,000
Consideration to identified intangible assets			48,900,000	26,900,000	28,000,000		25,000,000	23,300,000	7,100,000	2,500,000	16,800,000	1,100,000
Weighted average useful life of identified intangible assets					10 years		7 years	9 years	10 years	10 years	5 years	3 years
Deferred tax liabilities, intangible assets	20,116,000	19,760,000	12,100,000		10,700,000
Contingent consideration payments, minimum					0
Excess Consideration goodwill			47,500,000	43,600,000	58,400,000
Fair value of contingent consideration to be settled in stock				4,600,000
Share issued to shareholders in connection with business acquisition				229,000
Portion of shares issued determined to be part of the purchase price				0.3333
Fair value of shares as contingent compensation for post acquisition service				10,100,000
Fair value of shares as contingent compensation for post acquisition service period of recognition				2
Deferred tax asset which primarily relates to acquired net operating loss carryforwards					8,700,000
In-process research and development (IPR&D) asset recorded as part of acquisition						21,400,000
Cost basis prior to the aquisition					2,000,000
Gain included in other (expense) income, net, on Acquisiton					$ 2,900,000