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

	September 30, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. treasury securities	$	45,007	$	49	$	(2	)	$	45,054
Corporate bonds		69,360		214		(1	)		69,573
Asset-backed securities		21,455		89		—			21,544
Total	$	135,822	$	352	$	(3	)	$	136,171

	June 30, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses			Fair value
U.S. treasury securities	$	28,281	$	88	$	(1	)	$	28,368
Corporate bonds		70,781		360		(10	)		71,131
Asset-backed securities		24,333		142		—			24,475
Total	$	123,395	$	590	$	(11	)	$	123,974

The amortized cost and fair value amounts include accrued interest receivable of $0.5 million and $0.5 million as of September 30, 2020 and June 30, 2020, respectively.

As of September 30, 2020, the fair value of the Company’s short-term investments that mature within one year and thereafter was $120.6 million and $15.6 million, respectively, or 89% and 11%, respectively, of the Company’s total short-term investments. As of June 30, 2020, the fair value of the Company’s short-term investments that mature within one year and thereafter was $102.9 million and $21.1 million, respectively, or 83% and 17%, respectively, of the Company’s total short-term investments.

The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of the dates presented (in thousands):

	September 30, 2020
	Fair value		Unrealized losses
U.S. treasury securities	$	9,502	$	(2	)
Corporate bonds		3,258		(1	)
Total	$	12,760	$	(3	)

	June 30, 2020
	Fair value		Unrealized losses
U.S. treasury securities	$	2,798	$	(1	)
Corporate bonds		9,258		(10	)
Total	$	12,056	$	(11	)

Investments with unrealized losses have been in a continuous unrealized loss position for less than 12 months. The Company does not intend to sell the investments and it is not likely that the Company will be required to sell the investments before recovery of their amortized cost bases, which may be at maturity. Therefore, the Company does not consider those unrealized investment losses as other-than-temporary impairment of the investments. There have been no significant realized gains or losses on the short-term investments during the three months ended September 30, 2020 and 2019.