Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets
Accounts receivable, allowance for doubtful accounts	$ 79,377	$ 78,187
Equity
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	1,000	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	16,017,142	10,971,325
Common stock, shares outstanding (in shares)	15,364,711	10,604,868
Treasury stock, at cost (in shares)	652,431	366,457