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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2021 | Dec. 31, 2018
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Income tax benefit, result of CARES act of 2020 |  |  | $ 10,800,000 |  |  |
Valuation allowance established against deferred tax assets |  |  | 7,900,000 |  |  |
Tax rate differential on carrying back losses amount |  |  | $ 2,900,000 |  |  |
US corporate tax rate |  |  | 35.00% |  |  |
Federal tax rate |  | 21.00% | 21.00% | 21.00% |  |
Income tax expense, result of Alabama business tax competitiveness act | $ 1,600,000 |  |  |  |  |
Deferred tax asset, research and development credit carryforwards |  | $ 21,606,000 | $ 17,323,000 |  |  |
Deferred tax expense (benefit) recorded as an adjustment to other comprehensive (loss) income |  | 1,600,000 | (100,000) |  |  |
Deferred tax assets, gross |  | 59,643,000 | 55,687,000 |  |  |
Valuation allowance established against deferred tax assets |  | 50,564,000 | 45,818,000 |  |  |
Deferred tax assets tax credit carryforward net operating loss and research and development |  | 2,300,000 |  |  |  |
Increase in valuation allowance |  | 4,700,000 |  |  |  |
Net of deferred tax liabilities |  | 9,079,000 | 9,869,000 |  |  |
Foreign and domestic loss carry-forwards, research and development tax credits, unamortized research and development cost and state credit carry-forwards |  | $ 39,700,000 | 37,300,000 |  |  |
Operating loss carry forwards expiration year |  | 2029 |  |  |  |
Deferred tax assets |  | $ 18,708,000 | 21,625,000 |  |  |
Cash and cash equivalents |  | 56,603,000 | 60,161,000 |  |  |
Short-term investments (includes $350 and $1,731 of available-for-sale securities as of December 31, 2021 and 2020, respectively, reported at fair value) |  | 350,000 | 3,131,000 |  |  |
Short-term liquidity amount |  | 57,000,000.0 | 63,300,000 |  |  |
Withholding tax liabilities in jurisdiction |  | 700,000 | 700,000 |  |  |
Income tax benefit (expense) from stock options exercised adjustment to equity |  | 0 | 0 | $ 0 |  |
Unrecognized tax benefits |  | 17,836,000 | 1,078,000 | 1,487,000 |  | $ 1,868,000
Unrecognized tax benefits, effective tax rate |  | 17,800,000 | 1,000,000.0 | 1,400,000 |  |
Accrued interest and penalties |  | 200,000 | 300,000 | $ 500,000 |  |
Foreign Subsidiaries [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Short-term liquidity amount |  | $ 47,700,000 | $ 49,700,000 |  |  |
Short-term liquidity, in percentage |  | 83.50% | 78.50% |  |  |
Operating Losses Expiration Between 2021 and 2040 [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Deferred tax assets |  | $ 27,300,000 |  |  |  |
Minimum [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Operating loss carry forwards expiration year |  | 2022 |  |  |  |
Maximum [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Operating loss carry forwards expiration year |  | 2041 |  |  |  |
IRS [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Income tax refund receivable |  |  |  |  | $ 15,200,000 |
Deferred tax asset, research and development credit carryforwards |  |  |  |  | 1,800,000 |
Unrecognized tax benefits |  |  |  |  | $ 17,000,000.0 |
Domestic [Member] |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Deferred tax assets, gross |  | $ 48,265,000 | $ 43,791,000 |  |  |
Valuation allowance established against deferred tax assets |  | 48,265,000 | $ 43,791,000 |  |  |
Current valuation allowance established against deferred tax assets |  | $ 48,300,000 |  |  |  |

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