Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Accounts receivable, net of allowances	$ 1,182	$ 1,476
Property and equipment, net of accumulated depreciation	$ 25,663	$ 20,108
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	35,858	34,371
Common stock, shares outstanding	35,858	34,371