CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Sep. 30, 2011	Dec. 31, 2010
Accounts receivable, allowances	$ 445	$ 484	[1]
Common stock, par value	$ 0.001	$ 0.001	[1]
Common stock, shares authorized	130,000	130,000	[1]
Common stock, shares issued	58,232	48,276	[1]
Common stock, shares outstanding	58,232	48,276	[1]
Treasury stock, shares	618	618	[1]

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2010 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.