5. Other Long-Term Assets

        In June 2013, we purchased certain internet radio-related patents from Yahoo! Inc. for $8.0 million in cash. We intend to hold these patents as part of our strategy to protect and defend Pandora from patent-related litigation. These patents are being amortized over a period of eleven years.

        As part of our original May 2011 credit facility, we had entered into a cash collateral agreement in connection with the issuance of letters of credit that were used to satisfy deposit requirements under facility leases, refer to Note 8 "Debt Instruments" for more information. In September 2013, we amended the credit facility and terminated the cash collateral agreement. As a result, our outstanding letters of credit no longer required cash collateral and all cash collateral that was considered restricted cash was returned to us in September 2013.

Pending Acquisition

        In June 2013, we entered into a local marketing agreement to program KXMZ-FM, a Rapid City, South Dakota-area terrestrial radio station. In addition, we entered into an agreement to purchase the assets of KXMZ-FM for a total purchase price of approximately $0.6 million in cash, subject to certain closing conditions. As of December 31, 2013, we have paid $0.4 million of the purchase price, which is included in the other long-term assets line item of our balance sheets.

        The completion of the KXMZ-FM acquisition is subject to various closing conditions, which include, but are not limited to, regulatory approval by the Federal Communications Commission. Upon completion of these conditions, we expect to account for this transaction as a business combination.