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Note 8 - Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2012
Commitments and Contingencies Disclosure [Text Block] | 8. COMMITMENTS AND CONTINGENCIES Operating Leases Fuel Tech leases office space, automobiles and certain equipment under agreements expiring on various dates through 2019. Future minimum lease payments under non-cancellable operating leases that have initial or remaining lease terms in excess of one year as of December 31, 2012 are as follows:
Year of Payment |  | Amount |
2013 |  | $ | 629 |
2014 |  |  | 343 |
2015 |  |  | 294 |
2016 |  |  | 290 |
2017 |  |  | 290 |
Thereafter |  |  | 580 |
Total |  | $ | 2,426 |
For the years ended December 31, 2012, 2011 and 2010, rent expense approximated $964, $879, and $897, respectively. Fuel Tech has a sublease agreement with American Bailey Corporation (ABC) that obligates the sub-lessee to make future payments to the Company. ABC will reimburse Fuel Tech for its share of lease and lease-related expenses under Fuel Tech’s February 1, 2010 lease of its executive offices in Stamford, Connecticut. Please refer to Note 10 to the consolidated financial statements for a discussion of the relationship between Fuel Tech and ABC. The future minimum lease income under this non-cancellable sublease as of December 31, 2012 is as follows:
Year of Payment |  | Amount |
2013 |  | $ | 145 |
2014 |  |  | 145 |
2015 |  |  | 155 |
2016 |  |  | 155 |
2017 |  |  | 155 |
Thereafter |  |  | 310 |
Total |  | $ | 1,065 |
The terms of the Company’s four primary lease arrangements are as follows:
| - | The Stamford, Connecticut building lease term, for approximately 6,440 square feet, runs from February 1, 2010 to December 31, 2019. The facility houses certain administrative functions such as Investor Relations and certain APC sales functions.
| - | The Beijing, China building lease term, for approximately 5,800 square feet, runs from September 1, 2012 to August 31, 2013. This facility serves as the operating headquarters for our Beijing Fuel Tech operation. Fuel Tech has the option to extend the lease term at a market rate to be agreed upon between Fuel Tech and the lessor.
| - | The Durham, North Carolina building lease term, for approximately 16,000 square feet, runs from November 1, 2005 to April 30, 2014. Fuel Tech has no option to extend the lease.
| - | The Gallarate, Italy building lease term, for approximately 1,300 square feet, runs from July 1, 2005 to April 30, 2013. This facility serves as the operating headquarters for our Italy operations.
Performance Guarantees The majority of Fuel Tech’s long-term equipment construction contracts contain language guaranteeing that the performance of the system that is being sold to the customer will meet specific criteria. On occasion, performance surety bonds and bank performance guarantees/letters of credit are issued to the customer in support of the construction contracts as follows:
| - | in support of the warranty period defined in the contract; or
| - | in support of the system performance criteria that are defined in the contract.
As of December 31, 2012, Fuel Tech had outstanding bank performance guarantees and letters of credit in the amount of $8,544 in support of equipment construction contracts that have not completed their final acceptance test or that are still operating under a warranty period. The performance guarantees expire in dates ranging from April 2013 through September 2016. The expiration dates may be extended if the project completion dates are extended. Fuel Tech’s management believes it is probable that these projects will be successfully completed and that there will not be a materially adverse impact on Fuel Tech’s operations from these bank performance guarantees and letters of credit. As a result, no liability has been recorded for these performance guarantees. Product Warranties Fuel Tech issues a standard product warranty with the sale of its products to customers. Our recognition of warranty liability is based primarily on analyses of warranty claims experience in the preceding years as the nature of our historical product sales for which we offer a warranty are substantially unchanged. This approach provides an aggregate warranty accrual that is historically aligned with actual warranty claims experienced. Changes in the warranty liability in 2012, 2011 and 2010 are summarized below:
|  | 2012 |  |  | 2011 |  |  | 2010 |
Aggregate product warranty liability at beginning of year |  | $ | 313 |  |  | $ | 215 |  |  | $ | 199 |
Net aggregate expense related to product warranties |  |  | 1,208 |  |  |  | 650 |  |  |  | 170 |
Aggregate reductions for payments |  |  | (745 | ) |  |  | (552 | ) |  |  | (154 | )
Aggregate product warranty liability at end of year |  | $ | 776 |  |  | $ | 313 |  |  | $ | 215 |
Contingent Consideration from Business Acquisition In 2009, the Company recorded a contingent consideration accrual representing the fair value of the potential future consideration to be paid in connection with its acquisition of substantially all of the assets of Advanced Combustion Technology, Inc. (ACT). The contingent consideration earnout arrangement required the Company to pay ACT a pro rata amount of up to $4,000 annually for the achievement of a minimum annual gross margin dollar level (the Hurdle) of $10,000, $11,000, and $12,000 in fiscal 2009, 2010, and 2011, respectively. In addition, the agreement required the Company to pay ACT thirty-five percent of all qualifying gross margin dollars above the annual Hurdle rate for each of the three years. The potential undiscounted amount of all future payments that the Company could be required to make is between $0 and $4,000 in any one year, and $0 and $12,000 in total, not including the amount related to the thirty-five percent sharing of qualifying gross margin dollars above the pre-determined Hurdle. The fair value of the contingent consideration at inception was $2,307, which was recorded as a liability when the business combination was initially recorded. Each year while this earn-out was in effect, the Company evaluated the probability that payment of the contingent consideration accrual was probable based on a range of outcomes and assumptions used to develop the fair value estimate. Based upon this analysis, management concluded during each of the years ended December 31, 2011, 2010, and 2009 that the payout was not probable of being made. Thus, the Company recorded a gain of $758 and $768 from the revaluation of the contingent liability in 2011 and 2010, respectively. There is no contingent liability accrual remaining as of December 31, 2011.

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- Definition The entire disclosure for commitments and contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 14 -Paragraph 3 -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. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621 Reference 7: 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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