Warrants (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended		20 Months Ended	1 Months Ended
	Mar. 31, 2015	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Aug. 21, 2013
Class of Warrant or Right [Line Items]
Proceeds from warrant exercises	$ 3,221,000	$ 3,221,000	$ 979,000	$ 9,783,000
A Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants issued					2,200,000
Number of common stock to be purchased by warrants					2,200,000
Exercise date					Aug. 16, 2018
Shares covered by each warrant					1
Exercise price					$ 2.75
A Warrants [Member] | Underwriters [Member]
Class of Warrant or Right [Line Items]
Warrants issued					330,000
Number of common stock to be purchased by warrants					330,000
B Warrants [Member]
Class of Warrant or Right [Line Items]
Warrants issued					2,200,000
Number of common stock to be purchased by warrants					1,100,000
Exercise date					May 16, 2014
Shares covered by each warrant					2
Exercise price					$ 2.50
B Warrants [Member] | Underwriters [Member]
Class of Warrant or Right [Line Items]
Warrants issued					330,000
Number of common stock to be purchased by warrants					165,000
Representative Warrants [Member] | Underwriters [Member]
Class of Warrant or Right [Line Items]
Warrants issued					154,000
Number of common stock to be purchased by warrants					154,000
Exercise price					$ 3.125
Representative Warrants [Member] | Underwriters [Member] | Minimum [Member]
Class of Warrant or Right [Line Items]
Exercise date					May 16, 2014
Representative Warrants [Member] | Underwriters [Member] | Maximum [Member]
Class of Warrant or Right [Line Items]
Exercise date					Aug. 16, 2018