Commitments and Contingencies - Operating Leases (Detail)
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3 Months Ended | |
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Mar. 31, 2014
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Dec. 31, 2013
sqft
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Bedford, Massachusetts
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2014-09 | |
Billerica Massachusetts [Member]
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2014-09 | |
Woburn, Massachusetts
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2014-12 | |
Singapore
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2015-07 | |
FLORIDA
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2014-12 | |
New York State
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Operating Leased Assets [Line Items] | ||
Lease expiration date | 2015-04 | |
Billerica Massachusetts, New Location [Member]
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Operating Leased Assets [Line Items] | ||
Area of Real Estate Property | 90,000 | |
Lease expiration date | 2022-10 |