Condensed Consolidated Balance Sheets [Parenthetical] (USD $)	Jun. 30, 2013	Dec. 31, 2012
Allowance for accounts receivable (in dollars)	$ 32,000	$ 35,700
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares, issued	14,511,816	14,511,816
Common stock, shares, outstanding	12,615,595	12,619,640