BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)	2,000,000	2,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	12,687,921	12,507,870
Common stock, outstanding (in shares)	12,647,994	12,467,943
Treasury stock, at cost (in shares)	24,371	24,371