General form of registration statement for all companies including face-amount certificate companies

Income Taxes - Summary of the Overall Effective Tax Rate differs from the Statutory Federal Tax Rate (Detail)

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Income Taxes - Summary of the Overall Effective Tax Rate differs from the Statutory Federal Tax Rate (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory US federal rate   21.00% 21.00%
State income taxes   1.85% 2.19%
Stock-based compensation   (1.06%) (0.23%)
Nondeductible expenses   (0.61%) (0.22%)
Global intangible low-taxed income   (0.46%) (0.06%)
Research & development credits   3.48% 2.35%
Valuation allowance   (25.18%) (25.65%)
Change in statutory tax rate   (0.20%) 0.00%
Other rate items   0.24% 0.50%
Effective tax rate 50.00% (0.94%) (0.12%)