Condensed Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheet
Allowance for doubtful accounts, Accounts receivable	$ 68	$ 102
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	600,000	600,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	230,000	230,000
Common stock, shares issued	34,270	33,959
Treasury stock, shares at cost	2,975	2,885