Debt (Details)			1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 21, 2017 USD ($) item shares	Sep. 21, 2017 USD ($) item	Feb. 28, 2015 USD ($) $ / shares shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Debt Instrument [Line Items]
Conversion of debt						$ 80,000,000
Induced Conversion of Convertible Debt Expense						13,005,329
Amortization of debt issuance costs						$ 1,552,785	$ 547,366
4.75% Convertible Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 100,000,000
Net proceeds from debt			96,300,000
Payment of debt issuance costs			$ 3,700,000
Debt instrument, stated percentage			4.75%	4.75%		4.75%
Frequency of interest payments						semiannually
Debt instrument, effective interest rate				5.48%		5.48%
Number of shares issuable under conversion of debt | shares			19,600,000
Debt conversion ratio		176.2502				195.8336
Principal amount of Convertible Senior Notes	$ 1,000		$ 1,000
Conversion price of debt | $ / shares			$ 5.11
Percentage of principal amount redeemable			100.00%
Conversion of debt	$ 80,000,000
Number of tranches | item	3	3
Shares issued in exchange | shares	16,799,861
Number of shares converted | shares	1,133,173
Induced Conversion of Convertible Debt Expense	$ 13,000,000
Outstanding aggregate principal amount	$ 20,000,000	$ 20,000,000
Interest expense				$ 200,000	$ 1,400,000	$ 1,600,000	4,100,000
Amortization of debt issuance costs					$ 200,000	1,600,000	$ 500,000
Accelerated amortization of debt issuance costs						1,400,000
4.75% Convertible Senior Notes Due 2020 [Member] | Maximum
Debt Instrument [Line Items]
Amortization of debt issuance costs				$ 100,000		$ 100,000