Fair Value Measurements (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Liabilities, Fair Value Disclosure
Warrant liability	$ 6,394,000
Put option and note term extension option liabilities
Fair Value, Inputs, Level 1 [Member]
Liabilities, Fair Value Disclosure
Warrant liability
Put option and note term extension option liabilities
Fair Value, Inputs, Level 2 [Member]
Liabilities, Fair Value Disclosure
Warrant liability
Put option and note term extension option liabilities
Fair Value, Inputs, Level 3 [Member]
Liabilities, Fair Value Disclosure
Warrant liability	6,394,000
Put option and note term extension option liabilities