CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Accounts receivable, allowance for doubtful accounts	$ 133,000	$ 265,000
Stockholders' equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	35,000,000	35,000,000
Common stock, shares issued (in shares)	3,352,405	2,843,749
Common stock, shares outstanding (in shares)	3,352,405	2,843,749