SHORT-TERM INVESTMENTS (Tables)

9 Months Ended

12 Months Ended

Mar. 31, 2020

Jun. 30, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Short-Term Investments

Short-term investments consisted of the following as of the dates presented (in thousands):

	June 30, 2019
	Amortized cost		Gross unrealized gains		Fair value
U.S. treasury securities	$	64,683	$	75	$	64,758
Corporate bonds		4,787		-		4,787
Asset-backed securities		2,424		-		2,424
	$	71,894	$	75	$	71,969

	March 31, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
Corporate bonds	$	100,034	$	29	$	(571	)	$	99,492
U.S. treasury securities		28,193		180		-			28,373
Asset-backed securities		26,054		24		(105	)		25,973
	$	154,281	$	233	$	(676	)	$	153,838

Short-term investments consisted of the following (in thousands):

	June 30, 2018
	Amortized cost		Gross unrealized losses			Fair value
Corporate bonds	$	47,722	$	(26	)	$	47,696
U.S. treasury securities		12,965		(10	)		12,955
Asset-backed securities		9,228		(12	)		9,216
	$	69,915	$	(48	)	$	69,867

	June 30, 2019
	Amortized cost		Gross unrealized gains		Fair value
U.S. treasury securities	$	64,683	$	75	$	64,758
Corporate bonds		4,787		-		4,787
Asset-backed securities		2,424		-		2,424
	$	71,894	$	75	$	71,969

Schedule of Gross Unrealized Loss and Fair Values

The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of March 31, 2020 (in thousands):

	March 31, 2020
	Fair value		Unrealized losses
Corporate bonds	$	51,296	$	(571	)
Asset-backed securities		18,270		(105	)
Total	$	69,566	$	(676	)

The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of June 30, 2018 (in thousands):

	June 30, 2018
	Fair value		Unrealized Losses
Corporate bonds	$	21,396	$	(26	)
U.S. treasury securities		7,977		(10	)
Asset-backed securities		9,216		(12	)
Total	$	38,589	$	(48	)