Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Product Information [Line Items]
Minimum taxable income fixed for suspension of tax credit offset		$ 5.0
Average taxable income fixed for suspension of use of net operating losses		1.0
Maximum Threshold On Tax Credit Offset		$ 5.0
Cash and cash equivalents, maturity description	90 days or less
Maximum [Member]
Product Information [Line Items]
Short-term contractual maturities	1 year
Property and equipment, estimated useful lives	7 years
Minimum [Member]
Product Information [Line Items]
Short-term contractual maturities	1 year