Subsequent Events (Details) (USD $)	23 Months Ended			1 Months Ended					1 Months Ended
	Jun. 30, 2012	Aug. 06, 2012	Mar. 31, 2012	Jul. 31, 2012 Subsequent Events Employee Plan	Jul. 31, 2012 Subsequent Events Director Plan	Jul. 31, 2012 Subsequent Events Unaffiliated accredited investor item	Jun. 30, 2012 Subsequent Events Unaffiliated accredited investor	Jul. 24, 2012 Subsequent Events Unaffiliated accredited investor	Jun. 30, 2012 Subsequent Events Underwritten public offering	Jun. 29, 2012 Subsequent Events Underwritten public offering
Subsequent events
Number of shares of common stock issued		39,489,173	39,489,173					235,295		15,400,000
Price of shares of common stock issued (in dollars per share)										$ 2.60
Gross proceeds from issuance of shares of common stock		$ 39,489	$ 39,489							$ 40,040,000
Net proceeds from issuance of shares of common stock	$ 18,048,655						$ 1,000,004		$ 36,887,200
Options granted (in shares)					1,610,000	1,686,000
Options granted subject to approval by stockholders to increase the amount of shares available (in shares)				150,000	740,000	150,000
Term of warrant						1 year
Exercise price (in dollars per share)								$ 4.25
Number of unaffiliated accredited investors						1