Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Accounts receivable, allowances	$ 2,631	$ 3,440
STOCKHOLDERS' EQUITY:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	70,000	70,000
Common stock, shares issued	43,644	43,330
Common stock, shares outstanding	43,644	43,330