CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts receivable, allowances for doubtful accounts (in dollars)	$ 479	$ 476
Series A redeemable preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Series A redeemable preferred stock, Authorized shares	0	70,000
Series A redeemable preferred stock, issued shares	0	34,999.5
Series A redeemable preferred stock, outstanding shares	0	34,999.5
Series A redeemable preferred stock, liquidation preference (in dollars)	$ 0	$ 66,161
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, Authorized shares	110,000,000	2,300
Common stock, issued shares	9,602,970	0
Common shares outstanding	9,602,970	0
Class A
Common stock, Authorized shares	2,000	2,000
Common stock, issued shares	0	1,000
Common shares outstanding	0	1,000
Class B
Common stock, Authorized shares	300	300
Common stock, issued shares	0	0
Common shares outstanding	0	0