Note 8 - Stock-based Compensation (Details Textual) $ in Millions	3 Months Ended
Mar. 31, 2025 USD ($) shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)	10 years
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount \| $	$ 3.1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 10 months 24 days
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)	2,106,621
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

Aggregate number of common shares reserved for future issuance.

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