Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowances, accounts receivable	$ 1,177	$ 144
Common stock, par value	$ 0.00001	$ 0.00001
Common stock, shares authorized	100,000,000	41,410,000
Common stock, shares issued	40,856,000	1,698,000
Common stock, shares outstanding	40,856,000	1,698,000
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	10,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Convertible preferred stock
Preferred stock, par value	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	0	23,559,000
Preferred stock, shares issued	0	22,221,000
Preferred stock, shares outstanding	0	22,221,000