Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 142	$ 306
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, Authorized shares	1,000	1,000
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	25,000	25,000
Common stock, issued shares	16,667	16,453
Common stock, outstanding shares	14,512	14,313
Common shares in treasury, shares	2,155	2,140