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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Pre Adoption Accounting Standards Update 2009-13 | Dec. 31, 2012 Pre Adoption Accounting Standards Update 2009-13 | Dec. 31, 2011 Pre Adoption Accounting Standards Update 2009-13 | Jun. 30, 2013 UNITED KINGDOM | Dec. 31, 2012 UNITED KINGDOM | Dec. 31, 2013 Maximum | Dec. 31, 2013 Maximum Laser Products | Dec. 31, 2013 Maximum Precision Motion | Dec. 31, 2013 Maximum Medical Technologies | Dec. 31, 2013 Maximum Buildings and improvements | Dec. 31, 2013 Maximum Machinery and Equipment | Dec. 31, 2013 Minimum | Dec. 31, 2013 Minimum Laser Products | Dec. 31, 2013 Minimum Precision Motion | Dec. 31, 2013 Minimum Medical Technologies | Dec. 31, 2013 Minimum Buildings and improvements | Dec. 31, 2013 Minimum Machinery and Equipment
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents original maturity period |  |  |  |  |  |  |  |  | 3 months |  |  |  |  |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  |  |  |  |  | 41.20% | 25.10% | 50.00% |  |  |  |  |  | 20.00% |  |  |  |  |
Earnings from equity investment | $ 1,469,000 | $ 556,000 | $ 1,171,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net investment | 5,700,000 | 4,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, estimated useful lives |  |  |  |  |  |  |  |  |  |  |  |  | 30 years | 13 years |  |  |  |  | 3 years | 1 year
Standard warranty period |  |  |  |  |  |  |  |  |  | 24 months | 24 months | 60 months |  |  |  | 12 months | 12 months | 12 months |  |
Service contract period | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment terms |  |  |  |  |  |  |  |  | 180 days |  |  |  |  |  |  |  |  |  |  |
Recognition of deferred revenue |  |  |  | 0 | 300,000 | 31,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Post-emergence professional fees | $ 0 | $ 0 | $ 296,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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