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Commitments and Contingencies | 12 Months Ended
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Dec. 28, 2019
Commitments And Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 9. Commitments and Contingencies Operating Lease Commitments. We lease our operating facilities in Mountain View, California, under a non-cancelable operating lease through February 28, 2022. There are no remaining options to extend or renew the terms of this lease. Our operating lease commitments consist of facility and office equipment leases. Operating lease expense for fiscal years 2019 and 2018 was approximately $1.4 million and $1.3 million, respectively. The weighted average discount rate used in calculating the present value of lease payments was 5.4%. As of December 28, 2019, the weighted average remaining lease term for our operating leases was 2.2 years. The following represents maturities of operating lease liabilities as of December 28, 2019 (in thousands):
Fiscal Year |  | Operating Lease Payments |
2020 |  | $ | 1,553 |
2021 |  |  | 1,541 |
2022 |  |  | 318 |
2023 |  |  | — |
2024 |  |  | — |
Total lease payments |  |  | 3,412 |
Less: Imputed interest |  |  | (203 | )
Total future minimum lease payments |  | $ | 3,209 |
Purchase Commitments. Our purchase commitments consist primarily of non-cancellable purchase orders with vendors to manufacture certain components and ophthalmic instruments. Future minimum payments for our purchase commitments as of December 28, 2019 are summarized as follows (in thousands):
Fiscal Year |  | Purchase Commitments |
2020 |  | $ | 7,518 |
License Agreements. We are obligated to pay royalties equivalent to 5% of sales on certain products under certain license agreements with termination dates through the end of 2021. Royalty expense, charged to cost of revenues, was approximately $0.4 million and $0.3 million for fiscal years 2019 and 2018, respectively. Indemnification Arrangements. We enter into standard indemnification arrangements in our ordinary course of business. Pursuant to these arrangements, we indemnify, hold harmless, and agree to reimburse the indemnified parties for losses suffered or incurred by the indemnified parties (generally our business partners or customers) in connection with any trade secret, copyright, patent or other intellectual property infringement claim by any third-party with respect to our products. The term of these indemnification agreements is generally perpetual any time after the execution of the agreement. The maximum potential amount of future payments we could be required to make under these agreements is not determinable. We have never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, we believe the estimated fair value of these agreements is minimal. We have entered into indemnification agreements with our directors and officers that may require us to indemnify our directors and officers against liabilities that may arise by reason of their status or service as directors or officers, other than liabilities arising from willful misconduct of a culpable nature. These agreements also require us to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified and to make good faith determination whether or not it is practicable for us to obtain directors and officers insurance. We currently have directors and officers liability insurance. Legal Proceedings. From time to time, we may be involved in legal proceedings arising in the ordinary course of business. In general, management believes that ordinary course of business matters will not have a material adverse effect on our financial position or results of operations and are adequately covered by our liability insurance. However, it is possible that cash flows or results of operations could be materially affected in any particular period by the unfavorable resolution of one of more of these contingencies or because of the diversion of management’s attention and the incurrence of significant expenses.

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