Indebtedness (Tables)

9 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Total Interest Expense Related to Notes

The following table sets forth total interest expense related to the Notes:

	Three Months Ended March 31,						Nine Months Ended March 31,
	2018			2017			2018			2017
	(in thousands)
Contractual interest expense (cash)	$	—		$	711		$	1,194		$	2,135
Amortization of debt discount (non-cash)		—			3,188			5,574			9,396
Amortization of debt issue costs (non-cash)		—			296			494			888
	$	—		$	4,195		$	7,262		$	12,419
Effective interest rate of the liability component		—	%		8.22	%		8.45	%		8.10	%