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Income Taxes - Effective Income Tax Rate Differs from Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax provision computed at the federal statutory rate	21.00%	21.00%	21.00%	21.00%
State income tax provision, net of federal benefit	1.34%	2.60%	13.33%
Federal research credits	3.26%	6.74%	53.77%
Foreign taxes	3.52%	6.29%	(4.69%)
Tax-exempt income	0.06%	0.21%	3.75%
Change in valuation allowance	(35.19%)	63.92%	(75.26%)
Non-deductible transaction costs		(2.74%)	(39.48%)
Foreign tax credits	2.45%	(0.40%)	0.14%
Stock-based compensation	(0.57%)	(2.09%)	10.74%
Withholding taxes	0.01%	0.03%	0.14%
Alabama law change			(25.39%)
Adtran Networks tax exempt income	1.42%
Return to accrual	0.62%	0.24%	9.48%
Global intangible low-taxed income ("GILTI")	(5.87%)	(8.08%)	(4.29%)
Adtran Networks Goodwill Impairment	(4.62%)
Other, net	0.40%	(0.24%)	(0.19%)
Effective Tax Rate	12.17%	87.48%	(36.95%)

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