NOTE 10 :- COMMITMENTS AND CONTINGENT LIABILITIES a. Lease commitments: The Company and its subsidiaries lease their operating facilities under non-cancelable operating lease agreements, which expire over the next ten years, with the last ending in December 2024. The future minimum lease commitments of the Company and its subsidiaries under various non-cancelable operating lease agreements in respect of premises, that are in effect as of June 30, 2015, are as follows: 2016 $ 2,256 2017 2,218 2018 2,156 2019 2,042 2020 and thereafter 8,706 $ 17,378 Rent expenses for the years ended June 30, 2015, 2014 and 2013 were approximately $ 1,714 , $ 1,200 and $ 1,212 , respectively. b. Guarantees: As of June 30, 2015, contingent liabilities exist regarding guarantees in the amount of $ 813 , $ 53 and $ 85 in respect of office rent lease agreements, customs transactions and credit card limits, respectively. c. Royalty commitments: On April 12, 2009, the Company received approval for a grant in a total amount of $ 703 , from the BIRD-F in conjunction with a mutual development project with an American corporation. Under the Company's research and development agreements with the BIRD-F, and pursuant to applicable law, the Company is required to pay royalties at the rate of 5 % of gross sales of products developed with funds provided by the BIRD-F, up to an amount equal to 150 % of the research and development grants (dollar-linked) received from the BIRD-F. The obligation to pay these royalties is contingent on actual sales of the products and, in the absence of such sales, no payment is required. Royalties payable with respect to grants received from the BIRD-F are linked to the Consumer Price Index in the U.S. At the end of 2011, the American corporation that had partnered with the Company announced the discontinuation of its solar business, resulting in the termination of the mutual development agreements. As a result, the development has not advanced into a commercial product. The Company does not expect any revenues from