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Note 8 - Commitments and Contingencies (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Operating Leases, Rent Expense | $ 964,000 | $ 879,000 | $ 897,000 |
Loss Contingency, Estimate of Possible Loss |  |  |  | 2,307,000
undefined |  | 758,000 | 768,000 |
Loss Contingency Accrual, at Carrying Value |  | 0 |  |
Annual Amount Based On The Achievement Of A Minimum Annual Gross Margin Dollar Level (the Hurdle) [Member] | Advanced Combustion Technology, Inc. (ACT) [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 4,000,000
Minimum Annual Gross Margin Dollar Level (the Hurdle) For Fiscal 2009 [Member] | Advanced Combustion Technology, Inc. (ACT) [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Trigger |  |  |  | 10,000,000
Minimum Annual Gross Margin Dollar Level (the Hurdle) For Fiscal 2010 [Member] | Advanced Combustion Technology, Inc. (ACT) [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Trigger |  |  |  | 11,000,000
Minimum Annual Gross Margin Dollar Level (the Hurdle) For Fiscal 2011 [Member] | Advanced Combustion Technology, Inc. (ACT) [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Trigger |  |  |  | 12,000,000
Office Building [Member] | Stamford, Connecticut [Member] |  |  |  |
Area of Real Estate Property (in Square feet) | 6,440 |  |  |
Office Building [Member] | Beijing, China [Member] |  |  |  |
Area of Real Estate Property (in Square feet) | 5,800 |  |  |
Office Building [Member] | Durham, North Carolina [Member] |  |  |  |
Area of Real Estate Property (in Square feet) | 16,000 |  |  |
Office Building [Member] | Gallarate, Italy [Member] |  |  |  |
Area of Real Estate Property (in Square feet) | 1,300 |  |  |
Annual [Member] | Minimum [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 0
Annual [Member] | Maximum [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 4,000,000
Total [Member] | Minimum [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 0
Total [Member] | Maximum [Member] |  |  |  |
Business Acquisition, Contingent Consideration, Potential Cash Payment |  |  |  | 12,000,000
Equipment Construction Contracts [Member] |  |  |  |
Other Commitment | $ 8,544,000 |  |  |

X
- Definition Trigger for the payment of contingent consideration relating to the business acquisition. + References No definition available. + Details
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- Definition Amount of potential cash payments that could result from the contingent consideration arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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