Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 1,232	$ 742
Convertible preferred stock, par value	$ 1	$ 1
Convertible preferred stock, authorized shares	500	500
Convertible preferred stock, issued shares	0	0
Convertible preferred stock, outstanding shares	0	0
Common stock, par value	$ 0.1	$ 0.1
Common stock, shares authorized	80,000	80,000
Common stock, shares issued	14,855	14,855
Common stock, shares outstanding	13,963	13,659
Treasury Stock, shares	892	1,196