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Variable Interest Entity (VIE) - Additional Information (Detail) (USD $)
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1 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | ||||||
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Dec. 31, 2005
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Sep. 29, 2012
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Dec. 31, 2011
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Sep. 29, 2012
Licensed Rainbow Parameters [Member]
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Dec. 31, 2011
Cercacor Laboratories, Inc [Member]
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Sep. 30, 2009
Cercacor Laboratories, Inc [Member]
ExercisedOption
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Feb. 28, 2009
Cercacor Laboratories, Inc [Member]
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Sep. 29, 2012
Cercacor Laboratories, Inc [Member]
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Oct. 01, 2011
Cercacor Laboratories, Inc [Member]
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Sep. 29, 2012
Cercacor Laboratories, Inc [Member]
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Oct. 01, 2011
Cercacor Laboratories, Inc [Member]
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| Variable Interest Entity [Line Items] | |||||||||||
| Option fees | $ 7,500,000 | ||||||||||
| Number of exercised options for licenses | 3 | ||||||||||
| License fees | 2,500,000 | ||||||||||
| Percentage of royalty expense | 10.00% | ||||||||||
| Minimum aggregate royalty payments | 1,300,000 | 1,300,000 | 3,800,000 | 3,800,000 | |||||||
| Increase in royalties payable in current year | 15,000,000 | ||||||||||
| Increase in the minimum aggregate annual royalties payment after current year | 2,000,000 | ||||||||||
| Percentage reimbursed | 60.00% | 50.00% | |||||||||
| Total expenses for additional services, material and supplies | 1,000,000 | 500,000 | 2,600,000 | 1,900,000 | |||||||
| Noncontrolling interest | 2,730,000 | 2,838,000 | 2,800,000 | 2,700,000 | 2,700,000 | ||||||
| Total assets, net of intercompany eliminations | 6,000,000 | 8,600,000 | 8,600,000 | ||||||||
| Intangible assets | 2,500,000 | 4,100,000 | 4,100,000 | ||||||||
| Deferred tax assets | 1,400,000 | 1,400,000 | 1,400,000 | ||||||||
| Property and equipment | 1,200,000 | 2,200,000 | 2,200,000 | ||||||||
| Total liabilities, net of intercompany eliminations | 1,200,000 | 2,200,000 | 2,200,000 | ||||||||
| Accounts receivable eliminated upon consolidation | 2,900,000 | 2,000,000 | 2,000,000 | ||||||||
| Deferred revenue related to technology eliminated upon consolidation | $ 5,300,000 | $ 5,000,000 | $ 5,000,000 | ||||||||