Stockholders' Equity (Details) (USD $)	6 Months Ended
	Mar. 31, 2013	Aug. 31, 2012	May 01, 2012
Stockholders Equity (Additional Textual) [Abstract]
Aggregate of common stock preferred stock debt Securities and warrants limit under shelf registration		$ 100,000,000
Maximum proceeds from the sale of common stock though an at-the-market facility		25,000,000
Proceed from issuance of common stock	19,100,000
Common Stock Shares Issued	6,820,000
Proceeds From Warrant Exercises	1,000,000
Average exercise price of warrants outstanding	$ 1.43
Restricted stock units released, previously vested	510,188
Common stock issued in connection with vesting of restricted stock units	165,246
Stock issued during period, stock options exercised	389,781
Proceeds from stock options exercised	$ 543,000
Warrants to purchase shares			491,007
Warrant exercise price	2.78
Warrants, Expiration Date	May, 2022
Warrant One [Member]
Stockholders' Equity (Textual) [Abstract]
Common stock issued upon cashless exercise of warrants	710,109
Warrant Two [Member]
Stockholders' Equity (Textual) [Abstract]
Warrants outstanding to purchase shares	53,957
Warrants exercised	437,050
Common stock issued upon cashless exercise of warrants	72,185