CONSOLIDATED BALANCE SHEETS [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 186	$ 168
Preferred stock, par value (in dollars per share)	$ 10.00	$ 10.00
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	27,117,450	25,960,080
Common stock, shares outstanding	27,117,450	25,960,080
Convertible Preferred Stock [Member]
Preferred stock, shares issued	592	592
Preferred stock, shares outstanding	592	592
Preferred stock, liquidation preference	$ 592	$ 592