Unaudited Condensed Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Stockholders' Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	140,000,000	140,000,000
Common Stock, shares issued (in shares)	122,477,647	122,125,072
Common Stock, shares outstanding (in shares)	122,477,647	122,125,072