Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Income Taxes [Line Items]
Statutory tax rate	21.00%	21.00%	21.00%
Valuation allowances	$ 934,000	$ 969,000
Increase in valuation allowance	100,000
Deferred Tax Assets, Net	22,028,000	17,265,000
Net operating loss carryforwards	12,439,000	9,099,000
Deferred tax liabilities related to foreign earnings	800,000	800,000
Increase in unrecognized tax benefits	700,000
Increases for tax positions related to the current year	1,067,000	104,000	$ 495,000
Unrecognized tax benefits	4,848,000	4,142,000	3,917,000	$ 7,227,000
Unrecognized tax would impact effective tax rate	4,600,000	3,800,000	3,600,000
Lapse of statutes of limitations	279,000	2,416,000	3,763,000
Interest and penalties related to uncertain tax positions	900,000	500,000	400,000
Total Interest and penalties related to uncertain tax positions	300,000	$ 100,000	$ (100,000)
Income Tax Provision
Schedule Of Income Taxes [Line Items]
Increases for tax positions related to the current year	700,000
Minimum
Schedule Of Income Taxes [Line Items]
Lapse of statutes of limitations	0
Maximum
Schedule Of Income Taxes [Line Items]
Lapse of statutes of limitations	800,000
France
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	800,000
Denmark
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	8,700,000
Canada
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	300,000
Germany
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	300,000
CHINA
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	200,000
State and Local Jurisdiction
Schedule Of Income Taxes [Line Items]
Tax net operating loss carryforwards	16,900,000
Significant foreign jurisdictions
Schedule Of Income Taxes [Line Items]
Tax credits carryforwards	$ 100,000
Significant foreign jurisdictions \| Minimum
Schedule Of Income Taxes [Line Items]
Operating Loss Carryforward, Period	6 years
Domestic Tax Authority \| Minimum
Schedule Of Income Taxes [Line Items]
Operating Loss Carryforward, Period	10 years
Research Tax Credit Carryforward \| State and Local Jurisdiction
Schedule Of Income Taxes [Line Items]
Tax credits carryforwards	$ 1,300,000

NATUS MEDICAL INC 10-K