Note 11 - Stock-based Compensation (Details Textual) $ / shares in Units, $ in Millions		12 Months Ended
	Mar. 20, 2024 $ / shares shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 $ / shares	Dec. 22, 2021 $ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)		10 years
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount \| $		$ 1.8
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)		1 year 6 months 3 days
Fractional Shares [Member]
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)	0
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	12
Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		4 years
Share-Based Payment Arrangement, Tranche One [Member] \| Vesting on First Anniversary [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		25.00%
Share-Based Payment Arrangement, Tranche One [Member] \| Vesting On Pro Rata Basis Over Remaining Period [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		75.00%
Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Share-Based Payment Arrangement, Tranche Two [Member] \| Vesting on First Anniversary [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		33.33%
Share-Based Payment Arrangement, Tranche Two [Member] \| Vesting On Pro Rata Basis Over Remaining Period [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		66.66%
Aterian 2014 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		0
Aterian 2018 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		828,316
Inducement Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		193,476
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)		10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)		225,000

Aterian, Inc. 10-K