Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 420	$ 403
Common stock, Par value	$ 0.001	$ 0.001
Common stock, Authorized	1,000,000	1,000,000
Common stock, Issued	33,483	31,771
Treasury stock, shares	200	200