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Reconciliation of Income Taxes Computed at U.S Federal Statutory Tax rates to Income Tax Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Reconciliation Of Statutory Federal Tax Rate [Line Items]      
Tax benefit at U.S. statutory rates $ 8,674 $ 9,906 $ 3,532
State tax (99) 9 86
Warrant liability costs 3,806 (4,803) 5,803
Equity compensation (6) (2) 138
Increase in valuation allowance (10,536) (4,473) (9,082)
Other (1,847) (638) (478)
Income tax expense $ (8) $ (1) $ (1)
Tax benefit (expense) at U.S. statutory rates 21.00% 21.00% 21.00%
State tax 0.00% 0.00% 1.00%
Warrant liability costs 9.00% (10.00%) 35.00%
Equity compensation 0.00% 0.00% 1.00%
(Increase) decrease in valuation allowance (26.00%) (10.00%) (54.00%)
Other (4.00%) (1.00%) (3.00%)
Effective Income Tax Rate, Continuing Operations, Total 0.00% 0.00% 0.00%