Fair Value Measurements (Tables)

12 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Summary of financial assets that were accounted for at fair value

The following tables summarize the amortized cost, gross unrealized gains, gross unrealized losses and fair value by significant investment category for cash, cash equivalents and short‑term investments (in thousands):

	June 30, 2018
							Estimated Fair Value
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Cash and Cash Equivalents		Short-term Investments
Cash	$	83,083	$	—	$	—	$	83,083	$	—
Level 1
Money market funds		—		—		—		—		—
Level 2
U.S. government agency securities		—		—		—		—		—
Total	$	83,083	$	—	$	—	$	83,083	$	—

	June 30, 2017
								Estimated Fair Value
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Cash and Cash Equivalents		Short-term Investments
Cash	$	70,515	$	—	$	—		$	70,515	$	—
Level 1
Money market funds		1,569		—		—			1,569		—
Level 2
U.S. government agency securities		23,998		—		(89	)		—		23,909
Total	$	96,082	$	—	$	(89	)	$	72,084	$	23,909

Summary of carrying values and estimated fair values of short-term and long-term debt

The following table summarizes the carrying value and estimated fair value of Credit Facilities and Notes (in thousands):

	June 30, 2018				June 30, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
3.75% Convertible Notes	$	69,382	$	70,742	$	—	$	—
3.50% Convertible Notes		—		—		44,099		48,146
3.50% Series A Convertible Notes		—		—		68,924		74,982
Term Loan Facility		38,010		38,010		—		—
Revolving Credit Facility		23,685		23,685		51,548		51,548
Total	$	131,077	$	132,437	$	164,571	$	174,676