Debt - Conversion Note Due in 2015 and Other Financing (Details) (USD $)	7 Months Ended	0 Months Ended	3 Months Ended				3 Months Ended
	Aug. 03, 2013	Aug. 31, 2010 Convertible Notes Payable [Member]	Sep. 30, 2013 Diamler [Domain]	Sep. 30, 2013 Convertible Debt	Mar. 22, 2013 Convertible Debt	Aug. 31, 2010 Convertible Debt	Sep. 30, 2013 Capital Lease Obligations [Member] Capital One [Domain]	Aug. 31, 2010 Derivative – Convertible Notes embedded derivative
Debt Instrument [Line Items]
Proceeds from Convertible Debt		$ 55,000,000.0
Stated interest rate		9.50%	3.02%			9.50%	4.54%
Debt Instrument, Term			5 years				5 years
Unamortized discount								13,600,000
Debt Instrument, Face Amount				100,000.0	6,500,000.0
Closing price of common stock in excess of conversion price, percentage	150.00%
Conversion price numerator	1,000
Closing price of common stock in excess of conversion price, period in which the company may provide a conversion event notice, business days	20 days
Closing price of common stock in excess of conversion price, period of time in which the company may provide a conversion event notice	30 days
Period of time in which the conversion event will terminate	46 days
Period of time in which the conversion holder has to convert its convertible notes	45 days
Borrowing capacity under credit agreements							5,000,000
Capital Lease Obligations			$ 1,500,000.0				$ 700,000.0