Annual report pursuant to Section 13 and 15(d)

Income taxes - Additional information (Detail)

v3.21.2
Income taxes - Additional information (Detail)
 12 Months Ended
Jun. 30, 2021
USD ($)
Income Tax Disclosure [Line Items]  
Deferred tax assets increase in valuation allowance during the period $ 2,933
Uncertain tax benefits 0
Expected change in unrecognised tax benefits in the next twelve months $ 0
Coronavirus Aid Relief And Economic Security Act [Member]  
Income Tax Disclosure [Line Items]  
Number of years of certain operating losses that can be carried back 5 years
Income tax expense benefit $ 0
California Assembly Bill Eighty Five [Member]  
Income Tax Disclosure [Line Items]  
Income tax expense benefit $ 0
Suspension Of Annual Deduction Limitation [Member] | Coronavirus Aid Relief And Economic Security Act [Member]  
Income Tax Disclosure [Line Items]  
Percentage of annual Taxable income eligible for deduction 80.00%
Internal Revenue Service (IRS) [Member] | Minimum [Member]  
Income Tax Disclosure [Line Items]  
Percentage of total owneship control to be maintained by the current shareholders for availing operating loss carry forwards 50.00%
Period of ownership control for which the shareholders are to sustain their holding for availing operating loss carry forwards 3 years
Domestic Tax Authority [Member] | Tax Year 2014 [Member]  
Income Tax Disclosure [Line Items]  
Tax year subject to examination 2014
Domestic Tax Authority [Member] | Tax Year 2019 [Member]  
Income Tax Disclosure [Line Items]  
Tax year subject to examination 2019
State and Local Jurisdiction [Member] | Tax Year 2019 [Member]  
Income Tax Disclosure [Line Items]  
Tax year subject to examination 2019
State and Local Jurisdiction [Member] | Tax Year 2011 [Member]  
Income Tax Disclosure [Line Items]  
Tax year subject to examination 2011