Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Allowance for doubtful accounts	$ 27,000	$ 27,417
Shareholders' equity:
Common stock par value (in dollars per share)	$ 0.001	$ 0.001
Common stock shares authorized	50,000,000	50,000,000
Common stock shares issued	22,228,834	22,228,834
Common stock shares outstanding	22,228,834	22,228,834