Cover Page - shares	9 Months Ended
	Sep. 30, 2020	Nov. 06, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-31321
Entity Registrant Name	NAUTILUS, INC.
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	94-3002667
Entity Address, Address Line One	17750 S.E. 6th Way
Entity Address, City or Town	Vancouver
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98683
City Area Code	360
Local Phone Number	859-2900
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	NLS
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		30,258,840
Entity Central Index Key	0001078207
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020