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Guarantees | 12 Months Ended
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Dec. 31, 2020
Guarantees [Abstract] |
Guarantees | Guarantees We provide warranties on certain of our products at the time of sale and sell extended warranties. The standard warranty period for our capital equipment is generally one year and our extended warranties typically vary from one to three years. Liability under service and warranty policies is based upon a review of historical warranty and service claim experience. Adjustments are made to accruals as claim data and historical experience warrant. Changes in the carrying amount of standard warranties for the year ended December 31, are as follows:
| 2020 |  | 2019 |  | 2018
Balance as of January 1, | $ | 2,186 |  |  | $ | 1,585 |  |  | $ | 1,750 |
Provision for warranties | 783 |  |  | 1,699 |  |  | 1,099 |
Claims made | (1,143) |  |  | (1,098) |  |  | (1,264) |
Balance as of December 31, | $ | 1,826 |  |  | $ | 2,186 |  |  | $ | 1,585 |
Costs associated with extended warranty repairs are recorded as incurred and amounted to $6.1 million, $5.3 million and $4.9 million for the years ended December 31, 2020, 2019 and 2018 respectively.

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- Definition The entire disclosure for each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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