Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current assets
Accounts receivable, allowance for doubtful accounts	$ 5,000	$ 5,000
Stockholders' deficiency
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	58,187,378	57,852,041
Common stock, shares outstanding (in shares)	58,187,378	57,852,041