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Acquisitions - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Mar. 12, 2013 Alter [Member] | Jun. 30, 2013 Alter [Member] | Mar. 31, 2013 Alter [Member] | Dec. 31, 2013 Alter [Member] | Aug. 29, 2012 Plasmart, Inc. [Member] | Dec. 31, 2012 Plasmart, Inc. [Member] | Dec. 31, 2013 Plasmart, Inc. [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquisition purchase price, net of cash acquired |  |  |  | $ 2,426 |  |  |  | $ 22,607 |  |
Acquisition date |  |  |  |  |  |  | Mar. 12, 2013 |  |  | Aug. 29, 2012
Total cash paid, net of cash acquired | 2,326 | 22,607 |  | 2,426 | 2,058 | 2,426 |  | 22,607 |  |
Cash acquired from acquisition |  |  |  |  |  |  | 21 |  |  |
Remaining cash to be paid |  |  |  |  |  |  | 368 |  |  |
Holdback provisions paid |  |  |  |  |  |  | 123 |  |  |
Acquisition related costs |  |  |  |  |  |  |  | 1,258 |  |
Working capital adjustments |  |  |  |  |  |  |  |  | 1,778 |
Step-up inventory |  |  |  |  |  |  |  | $ 303 |  |

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