Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Income Tax Expense Between Statutory U S Income Tax Rate With Actual Income Tax Provision (Detail)

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Income Taxes - Reconciliation of Income Tax Expense Between Statutory U S Income Tax Rate With Actual Income Tax Provision (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Income Tax Disclosure [Abstract]                      
Statutory federal income taxes                 $ 8,819 $ 741 $ (1,163)
State income taxes, net of federal benefit                 (1,284) 144 0
Non-deductible expenses                 926 272 1,097
Change in warrant liability                 0 2,012 1,024
Change in Mobile Posse earn-out                 3,238 0 0
Excess deductions for stock compensation                 (16,523) (1,384) (47)
Change in uncertain tax liability                 591 32 (5)
Change in valuation allowance                 (11,223) (12,262) (2,422)
Return-to-provision adjustments                 2,243 0 2,411
Other miscellaneous                 186 70 (426)
Total income tax provision / (benefit) $ (15,125) $ 1,061 $ 661 $ 376 $ (10,381) $ 41 $ 72 $ (107) $ (13,027) $ (10,375) $ 469