Basic and Diluted Net Income (Loss) Per Share (Narrative) (Details)	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Earnings Per Share [Abstract]
Potentially dilutive shares
Potentially dilutive restricted stock units	277,900		253,400
Potentially dilutive warrants		4,066		2,022