CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in thousands of dollars)	$ 186	$ 168
Preferred stock, par value (in dollars per share)	$ 10	$ 10
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	27,109,305	25,960,080
Common stock, shares outstanding	27,109,305	25,960,080
Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 10	$ 10
Preferred stock, shares issued	592	592
Preferred stock, shares outstanding	592	592
Preferred stock, liquidation preference (in thousands of dollars)	$ 592	$ 592