Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 28, 2015	Dec. 27, 2015
Business Acquisition [Line Items]
Common stock, shares authorized		250,000,000		250,000,000		250,000,000	250,000,000	100,000,000
Preferred stock, shares authorized							50,000,000	10,000,000
Amortization of intangibles		$ 1,600	$ 97	$ 3,636	$ 190
GE Medical [Member]
Business Acquisition [Line Items]
Ownership percentage upon conversion of preferred stock		32.00%		32.00%
Clarient, Inc. [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price in cash payment	$ 73,800
Payment for working capital adjustment	$ 6,700
Business acquisition, purchase price payment in share	15,000,000
Discount due to lack of marketability of the common stock, percent	15.00%
Fair value of preferred stock consideration	$ 102,510
Fair value of preferred stock	$ 8.04
Acquired intangible assets	$ 84,000
Amortization of intangibles		$ 1,500		$ 3,500
Provisional fair value of accounts receivable acquired	27,600
Debt issuance costs						$ 3,300
Clarient, Inc. [Member] | General and Administrative Expense [Member]
Business Acquisition [Line Items]
Acquisition related transaction costs						$ 4,700
Clarient, Inc. [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 81,000
Intangible asset amortization period	15 years
Clarient, Inc. [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets	$ 3,000
Intangible asset amortization period	2 years
Clarient, Inc. [Member] | Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price in cash payment	$ 9,500
Clarient, Inc. [Member] | Term Loan [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price in cash payment	53,600
Clarient, Inc. [Member] | Cash on Hand [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price in cash payment	$ 10,700
Clarient, Inc. [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price payment in share	15,000,000
Clarient, Inc. [Member] | Series A Redeemable Convertible Preferred Stock [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price payment in share	14,666,667
Fair value of preferred stock consideration	$ 73,200
Fair value of preferred stock	$ 4.99
Carrying amount of preferred stock	$ 28,600