Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Aug. 31, 2012	Aug. 31, 2011
Consolidated Balance Sheets [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	15,000	15,000	15,000
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000	150,000	150,000
Common stock issued (in shares)	52,425	50,568	35,569
Common stock, shares outstanding (in shares)	52,425	50,568	35,569