CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Allowance for accounts receivable	$ 257	$ 289
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	33,088	32,502
Common stock, shares outstanding	31,124	30,538
Treasury stock, shares repurchased	1,964	1,964