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Commitments | 12 Months Ended
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Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract] |
Commitments |
12. | Commitments
Leases The Company has entered into operating leases for facilities and equipment. These leases are non-cancellable and typically do not contain renewal options, except for certain facility leases. Certain leases contain rent escalation clauses for which the Company recognizes the expense on a straight-line basis. Rent expense under the Company’s operating leases for the years ended December 31, 2018, 2017 and 2016 was approximately $3.5 million, $3.1 million and $3.0 million, respectively. Future minimum lease payments under operating leases as of December 31, 2018 are as follows:
(U.S. Dollars, in thousands) |  |  |  |
2019 |  | $ | 3,330 |
2020 |  |  | 2,729 |
2021 |  |  | 2,946 |
2022 |  |  | 2,818 |
2023 |  |  | 1,727 |
Thereafter |  |  | 11,372 |
Total |  | $ | 24,922 |
In January 2019, subsequent to the adoption of ASU 2016-02, the Company entered into an amendment for its corporate headquarters lease. As a result of this amendment, the classification of the lease changed from an operating lease to a finance lease resulting in an increase in both the lease liability and lease asset of approximately $8 million during the first quarter of 2019. Inventory purchase commitments The Company had inventory purchase commitments with third-party manufacturers for $0.1 million and $1.9 million as of December 31, 2018, and 2017, respectively.

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- Definition The entire disclosure for significant arrangements with third parties, which includes operating lease arrangements and arrangements in which the entity has agreed to expend funds to procure goods or services, or has agreed to commit resources to supply goods or services, and operating lease arrangements. Descriptions may include identification of the specific goods and services, period of time covered, minimum quantities and amounts, and cancellation rights. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -URI http://asc.fasb.org/topic&trid=2144648 + Details
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