Shareholders' Equity

3 Months Ended

Mar. 31, 2016

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders' Equity

Retired Shares

During the three months ended March 31, 2016 and 2015, we repurchased and contemporaneously retired 122,981 and 21,807 shares of our common stock at an aggregate cost of $371,000 and $54,000, respectively, pursuant to both open market and private purchases and the return of stock by holders of equity incentive awards to pay tax withholding obligations.

We had 1,459,233 loaned shares outstanding at March 31, 2016 and December 31, 2015, which were originally lent in connection with our November 2005 issuance of convertible senior notes. We retire lent shares as they are returned to us.