Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2013

Dilutive and Antidilutive Options

The dilutive and antidilutive options are shown separately in the table below.

Three Months Ended March 31,	2013		2012
Additional shares		800,600		829,500
Antidilutive options		2,384,300		2,571,900