Warrant Liability (Details) (USD $)	1 Months Ended			3 Months Ended
	May 07, 2013	Mar. 31, 2013	Jul. 31, 2008	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Warrant Liability [Abstract]
Units issued in direct offering	1,300,000	200,000	6,686,650		3,300,000
Common shares per unit			1
Proceeds from direct offering	$ 3,200,000		$ 17,500,000	$ 400,000	$ 6,400,000
Shares entitled per warrant			0.5
Equity issuance, price per share			$ 2.68
Aggregate shares common stock callable by warrants			3,343,325
Exercise price of warrants			3.62
Change in fair value of warrant liability						101,000
Warrant liability		$ 267,000			$ 267,000		$ 267,000