Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Taxes [Line Items]
Interest and/or penalties recognized related to uncertain income tax positions in income tax expense	$ 83,000	$ 76,000
Operating loss carryforwards not subject to expiration	96,500,000
Increase in valuation allowance	14,300,000	7,600,000
Uncertain tax position reserve recorded	2,100,000	2,000,000
Interest and/or penalties accrued related to uncertain income tax positions	507,000	424,000
Unrecognised tax benefits that would impact effective income tax rate	1,600,000	$ 1,600,000
Possible Expiration Of Certain Statutes Due To Limitations [Member]
Income Taxes [Line Items]
Significant reduction in unrecognised tax benenfits is reasonably possible	$ 1,600,000
Maximum [Member]
Income Taxes [Line Items]
Net operating losses carryforwards expiration year	2039 years
Minimum [Member]
Income Taxes [Line Items]
Net operating losses carryforwards expiration year	2022 years
Federal [Member]
Income Taxes [Line Items]
Net operating losses carryforwards	$ 24,800,000
Tax Credit Carryforward, Amount	28,900,000
State [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	900,000
Net Operating Losses Carryforwards	$ 5,800,000
Research And Development Tax Credit [Member] | Maximum [Member]
Income Taxes [Line Items]
Research and development tax credits carry forwards	2049 years
Research And Development Tax Credit [Member] | Minimum [Member]
Income Taxes [Line Items]
Research and development tax credits carry forwards	2027 years