Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.21.1
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