BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Shareholders' Equity:
Common stock, par value (in dollars per value)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	7,079,638	6,911,570
Common stock, shares outstanding (in shares)	6,946,381	6,789,736
Treasury stock, shares (in shares)	133,257	121,834