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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Operating loss carryforwards	$ 2,845	$ 4,879
Valuation allowances	6,518	4,713
Incentive tax credit carryforwards	8,715	6,669
Unrecognized tax benefits	4,292	4,069	$ 3,894
Potential increase (decrease) in income tax provision	3,700	3,400
CaseStack, Inc. [Member] | Internal Revenue Service [Member]
Income Taxes [Line Items]
Operating loss carryforwards	1,300	$ 1,300
Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards	1,500
Incentive tax credit carryforwards	100
Federal [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards			$ 4,100
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards	1,200
Incentive tax credit carryforwards	8,600
State [Member] | Loss Carryforward [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Valuation allowances	55
State [Member] | Tax Incentive Credit Carryforwards [Member]
Income Taxes [Line Items]
Valuation allowances	6,400
Minimum [Member]
Income Taxes [Line Items]
Possible reduction in unrecognized tax benefits resulting from audit settlements	$ 1,000
Minimum [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2021
Minimum [Member] | Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2025
Minimum [Member] | State [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2021
Maximum [Member]
Income Taxes [Line Items]
Possible increase in unrecognized tax benefits resulting from audit settlements	$ 1,000
Maximum [Member] | CaseStack, Inc. [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2039
Maximum [Member] | Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2028
Maximum [Member] | State [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration date	Dec. 31, 2025

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