7. Royalty Liability

On March 15, 2011, under a royalty agreement, in exchange for $3.0 million that was recorded as royalty liability, we agreed to pay Deerfield 2.5% of the net sales of Fanapt, constituting a portion of the royalty revenue that we are entitled to under our sublicense agreement with Novartis. The agreements with Deerfield also provide us with the option to repurchase the royalty rights for $40.0 million.

The $3.0 million received under the March 2011 royalty agreement was recorded as a royalty liability in accordance with the appropriate accounting guidance as the related agreement includes a provision which allows us to repurchase the royalty rights from Deerfield through a payment of a lump sum. Interest on the royalty liability is being recognized using the interest method based on the estimated future royalties expected to be paid under the royalty agreement. The current effective annual interest rate is 51.0%.

Under the November 14, 2011 amended and restated royalty agreement, in exchange for an additional $5.0 million royalty liability, Deerfield is entitled to the balance of our portion of the royalties on Fanapt (5.5% to 7.5% of net sales, net of the 2.5% previously agreed to have been provided to Deerfield) up to specified threshold levels of net sales of Fanapt and 40% of the royalties above the threshold level. We retain 60% of the royalties on net sales of Fanapt above the threshold levels, subject to an agreement that half of any such retained royalties will go towards repayment of our outstanding debt to Deerfield. Funding occurred on November 25, 2011. The proceeds of this transaction are being used to advance the development of Probuphine and for general corporate purposes.

The $5.0 million received under the November 2011 royalty agreement was recorded as a royalty liability in accordance with the appropriate accounting guidance as the related agreement includes a provision which allows us to repurchase the royalty rights from Deerfield through a payment of a lump sum. Interest on this royalty obligation is being recognized using the interest method based on the estimated future royalties expected to be paid under the royalty agreement.

On March 28, 2013, we amended the agreements with Deerfield terminating our option to repurchase the royalty rights. As a result, we have recognized a gain on the extinguishment of the royalty liability of $9.0 million because we are no longer required to account for it as a liability. Additionally, we will no longer recognize royalty income related to the Fanapt royalty payments received from Novartis unless Fanapt sales exceed certain thresholds.