Note 7 - Stock-based Compensation (Details Textual) $ in Millions	9 Months Ended
Sep. 30, 2023 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 \| $	$ 8.7
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 4 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 Period (Year)	33 years
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 Period (Year)	66 years
Aterian 2014 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	99,310
Aterian 2018 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	2,300,443
Aterion 2019 Equity Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	0
Aterion 2019 Equity Plan [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum	70.00%
Inducement Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	2,180,000
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)	2,700,000

Aggregate number of common shares reserved for future issuance.

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