Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Condensed Balance Sheets [Abstract]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	13,602,000	13,630,000
Common stock, shares outstanding	13,602,000	13,630,000