Assets and Liabilities Held for Sale - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on assets held for sale		$ 3,136	$ 0	$ 67,800
Fiagon AG Medical \| Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, estimated selling costs		300		1,000
Fiagon AG Medical \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Inventories
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, estimated selling costs		$ 300		$ 300
Fiagon AG Medical \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Accounts Payable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operations, estimated selling costs	$ 700

Intersect ENT, Inc. 10-Q