7. Commitments and Contingencies

Operating Lease Agreements and Long-term Debt

The Company leases office and manufacturing space under non-cancelable operating leases with various expiration dates through June 2025. Rent expense was $8.6 million, $8.3 million and $8.0 million for the years ended June 30, 2017, 2016 and 2015, respectively. The terms of some of the facility leases provide for rental payments on a graduated scale. For these leases, the Company recognizes rent expense on a straight-line basis over the lease period, and has accrued for rent expense incurred but not paid.

The Company is also required to make semi-annual interest payments on the Existing 3.50% Convertible Notes and monthly interest payments on the Revolver Credit Facility. See Note 12, Debt, for details.

Future minimum lease payments under non-cancelable operating lease agreements and short-term principal and interest on the Existing 3.50% Convertible Notes and Revolving Credit Facility as of June 30, 2017 are as follows including the effects of the subsequent debt financing as reported in Note 18 (in thousands):

Year Ending June 30,	Operating Leases		Long-Term Debt(1)
2018	$	9,290	$	47,597
2019		7,569		6,827
2020		6,844		6,828
2021		6,062		6,828
2022		6,093		58,827
Thereafter		12,642		85,266

Total	$	48,500	$	212,173


(1)	These amounts represent principal and interest cash payments over the contractual life of the debt obligations, including anticipated interest payments that are not recorded on the Company's consolidated balance sheet. Any conversion, premium, redemption or purchase of Convertible Notes would impact cash payments noted in the preceding table.

The Company's purchase commitments and obligations include all open purchase orders and contractual obligations in the ordinary course of business, including commitments with contract manufacturers and suppliers, for which the Company has not received the goods or services and acquisition and licensing of intellectual property. A majority of these purchase obligations are due within a year. Although open purchase orders are considered enforceable and legally binding, the terms generally allows the Company the option to cancel, reschedule, and adjust its requirements based on the Company's business needs prior to the delivery of goods or performance of services, and hence, have not been included in the table above.

The Company enters into standard indemnification agreements with its landlords and all superior mortgagees and their respective directors, officers' agents, and employees in the ordinary course of business. Pursuant to these agreements, the Company will indemnify, hold harmless, and agree to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally the landlords, in connection with any loss, accident, injury, or damage by any third-party with respect to the leased facilities. The term of these indemnification agreements is from the commencement of the lease agreements until termination of the lease agreements. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, historically the Company has not incurred claims or costs to defend lawsuits or settle claims related to these indemnification agreements. The Company has not recorded any liability associated with its indemnification agreements as it is not aware of any pending or threatened actions that represent probable losses as of June 30, 2017.

Royalty Agreement

The Company has an exclusive license agreement with the Wisconsin Alumni Research Foundation (WARF), to make, use, sell and otherwise distribute products under certain of WARF's patents anywhere in the world. The Company is required to pay WARF a royalty for each TomoTherapy System sold that includes the licensed technology. The license agreement expires upon expiration of the patents and may be terminated earlier if the Company so elects. WARF has the right to terminate the license agreement if the Company does not meet the minimum royalty obligation of $0.3 million per year, or if the Company commits any breach of the license agreement's covenants. The Company recorded royalty costs of $0.5 million, $0.6 million and $0.6 million for the years ended June 30, 2017, 2016 and 2015, respectively, which were recorded in cost of revenue or deferred cost of revenue. The Company had accrued liabilities of approximately $0.2 million and $0.2 million at June 30, 2017 and 2016, respectively, related to this agreement.

Software License Indemnity

Under the terms of the Company's software license agreements with its customers, the Company agrees that in the event the software sold infringes upon any patent, copyright, trademark, or any other proprietary right of a third-party, it will indemnify its customer licensees against any loss, expense, or liability from any damages that may be awarded against its customer. The Company includes this infringement indemnification in all of its software license agreements and selected managed services arrangements. In the event the customer cannot use the software or service due to infringement and the Company cannot obtain the right to use, replace or modify the license or service in a commercially feasible manner so that it no longer infringes, then the Company may terminate the license and provide the customer a refund of the fees paid by the customer for the infringing license or service. The Company has not recorded any liability associated with this indemnification, as it is not aware of any pending or threatened actions that represent probable losses as of June 30, 2017.

Litigation

From time to time, the Company is involved in legal proceedings arising in the ordinary course of its business. The Company records a provision for a loss when it believes that it is both probable that a loss has been incurred and the amount can be reasonably estimated. Currently, management believes the Company does not have any probable and estimable losses related to any current legal proceedings and claims. Although occasional adverse decisions or settlements may occur management does not believe that an adverse determination with respect to any of these claims would individually or in the aggregate materially and adversely affect the Company's financial condition or operating results. Litigation is inherently unpredictable and is subject to significant uncertainties, some of which are beyond the Company's control. Should any of these estimates and assumptions change or prove to have been incorrect, the Company could incur significant charges related to legal matters that could have a material impact on its results of operations, financial position and cash flows.