CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Reserves for accounts receivable	$ 1,131	$ 1,240
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	140,000	140,000
Common stock, shares issued	43,055	42,223
Common stock, shares outstanding	43,055	42,223