Debt (Details) - USD ($) $ / shares in Units, shares in Millions					1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 01, 2016	Jan. 11, 2016	Apr. 17, 2014	Aug. 01, 2011	Jan. 31, 2016	Feb. 28, 2013	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Debt
Carrying amount of the equity conversion component								$ 27,514,000
Principal amount of the Notes								219,858,000
Aggregate principal amount of debt refinanced										$ 7,844,000
Unamortized debt costs								(4,271,000)
Unamortized debt discount								(5,175,000)
Net carrying amount								210,412,000
Interest expense related to contractual interest coupon								9,411,000	$ 7,774,000	7,774,000
Interest expense related to amortization of debt discount								6,321,000	7,241,000	5,105,000
Interest expense related to amortization of debt issuance costs								1,728,000	1,503,000	1,408,000
Total interest expense recognized								17,460,000	$ 16,518,000	$ 14,287,000
Secured Loan
Debt
Aggregate principal amount of debt issued		$ 7,000,000
Quarterly installment payment		875,000
Proceeds from debt, net of costs		65,500,000
Offering costs		3,100,000
Initial purchaser's discount and commission		$ 1,400,000
Amortization period		5 years
EBITDA Monitoring Period		12 months
Prepayment premium if loan repaid or accelerated within the first year		2.00%
Prepayment premium if loan repaid or accelerated within the second year		1.00%
Principal amount of the Notes								68,250,000
Unamortized debt costs								(2,786,000)
Unamortized debt discount								(1,260,000)
Net carrying amount								$ 64,204,000
Secured Loan | Option (ii)
Debt
Interest rate (as a percent)		3.25%
Secured Loan | Maximum | 3.50% Convertible Notes
Debt
Debt instrument maturity before reference instrument maturity date		120 days
Secured Loan | One month LIBOR | Option (i)
Debt
Margin on interest rate		7.00%
Secured Loan | One month LIBOR | Option (ii)
Debt
Margin on interest rate		1.00%
Secured Loan | LIBOR | Minimum | Option (i)
Debt
Interest rate (as a percent)		1.00%
Secured Loan | Federal Funds Rate | Option (ii)
Debt
Margin on interest rate		0.50%
Secured Loan | US Prime Rate | Option (ii)
Debt
Margin on interest rate		4.75%
3.75% Convertible Note and 3.50% Convertible Note
Debt
Charge associated with repurchase of notes							$ 1,000,000
3.75% Convertible Notes
Debt
Aggregate principal amount of debt issued				$ 100,000,000
Interest rate (as a percent)				3.75%				3.75%	3.75%
Proceeds from debt, net of costs				$ 96,100,000
Amortization period								1 month
Debt issuance costs, amortization period				5 years
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be convertible into common stock								30 days
Number of consecutive business days immediately after any five consecutive trading day period during the note measurement period								5 days
Number of consecutive trading days before five consecutive business days during the note measurement period								5 days
Principal amount used for debt instrument conversion ratio								$ 1,000
Number of working days preceding maturity date for delivery of shares or payment of cash								33 days
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)								105.5548
Conversion price (in dollars per share)								$ 9.47
Repurchase price, as percentage of principal amount, if company undergoes change of control								100.00%
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable								20 days
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be redeemable								30 days
Discount rate on liability component (as a percent)				10.00%
Carrying amount of the equity conversion component				$ 24,100,000				$ 19,670,000
Debt issuance costs and discount allocated to equity conversion component				900,000
Principal amount of the Notes retired					$ 63,400,000
Cash paid to Participating Holders in connection with debt refinancing					$ 66,600,000
Potentially dilutive shares outstanding					6.7
Principal amount of the Notes				$ 75,900,000	$ 36,600,000			36,608,000
Unamortized debt costs								(26,000)
Unamortized debt discount								(182,000)
Net carrying amount								$ 36,400,000
Effective interest rate (as a percent)								10.90%
3.75% Convertible Notes | Minimum
Debt
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be convertible into common stock								20 days
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be convertible								130.00%
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be redeemable								130.00%
3.75% Convertible Notes | Maximum
Debt
Percentage of the trading price to the product of the sale price of the entity's common stock and the conversion rate								98.00%
3.75% Convertible Notes | Subsequent Event
Debt
Aggregate principal amount of debt issued	$ 36,600,000
Interest rate (as a percent)	3.75%
Cash paid to Participating Holders in connection with debt refinancing	$ 37,300,000
Total interest expense recognized	$ 700,000
3.50% Convertible Notes
Debt
Aggregate principal amount of debt issued						$ 115,000,000
Interest rate (as a percent)			3.50%			3.50%		3.50%	3.50%
Proceeds from debt, net of costs						$ 110,500,000
Debt issuance costs, amortization period						5 years
Principal amount used for debt instrument conversion ratio								$ 1,000
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)								187.6877
Conversion price (in dollars per share)								$ 5.33
Repurchase price, as percentage of principal amount, if company undergoes change of control								100.00%
Principal amount of the Notes								$ 44,654,000
Aggregate principal amount of debt refinanced			$ 70,300,000
Conversion rate, amount of debt to be issued per $1000 of principal amount			1,000
Unamortized debt costs								(1,459,000)
Net carrying amount								$ 43,195,000
3.50% Series A Convertible Notes
Debt
Aggregate principal amount of debt issued			$ 70,300,000
Interest rate (as a percent)			3.50%					3.50%	3.50%
Amortization period								19 months
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be convertible into common stock								20 days
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be convertible into common stock								30 days
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be convertible								130.00%
Number of consecutive business days immediately after any five consecutive trading day period during the note measurement period								5 days
Number of consecutive trading days before five consecutive business days during the note measurement period								5 days
Number of working days preceding maturity date for delivery of shares or payment of cash								17 days
Conversion rate, number of shares to be issued per $1000 of principal amount (in shares)								187.6877
Conversion price (in dollars per share)								$ 5.33
Repurchase price, as percentage of principal amount, if company undergoes change of control								100.00%
Discount rate on liability component (as a percent)								7.00%
Carrying amount of the equity conversion component								$ 7,844,000
Principal amount of the Notes								70,346,000
Payments made to convertible note holders			$ 400,000
Portion of cash amount paid allocated to debt discount								400,000
Portion of cash amount paid allocated to equity component								47,000
Unamortized debt discount								(3,733,000)
Net carrying amount								$ 66,613,000
Effective interest rate (as a percent)								7.10%
3.50% Series A Convertible Notes | Maximum
Debt
Percentage of the trading price to the product of the sale price of the entity's common stock and the conversion rate								98.00%