Income Taxes (Tables)

12 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Deferred tax assets and liabilities

	June 30,
	2020		2019
Deferred tax assets
Stock-based compensation	$	4,536	$	3,803
Deferred revenue	1,596		2,032
Accrued expenses and compensation	1,144		1,058
Other	2,150		1,062
Research and development credit carryforwards	6,006		5,161
Net operating loss carryforwards	71,925		65,628
Total deferred tax assets	87,357		78,744
Valuation allowance	(87,357)		(78,744)
Net deferred tax assets	$	—	$	—

Summary of valuation allowances

Balances at June 30, 2017	$	101,031
Reductions	(24,901)
Balance at June 30, 2018	76,130
Additions	2,614
Balance at June 30, 2019	78,744
Additions	8,613
Balance at June 30, 2020	$	87,357

Reconciliation of beginning and ending amount of unrecognized tax benefits

Balances at June 30, 2017	$	570
Decreases related to prior year tax positions	(3)
Increases related to current year tax positions	30
Balances at June 30, 2018	597
Decreases related to prior year tax positions	(11)
Increases related to current year tax positions	25
Balance at June 30, 2019	611
Decreases related to prior year tax positions	36
Increases related to current year tax positions	64
Balance at June 30, 2020	$	711