Note 11 - Debt - Loans With Governmental Agencies (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Principal, loans with governmental agencies	$ 324,767
Loans With Governmental Agencies [Member]
Principal, loans with governmental agencies	$ 324,767
Loans With Governmental Agencies [Member] | Ministry of Economy and Competitiveness, Debt, Due February 2, 2022 [Member]
Due date, loans with governmental agencies	Feb. 02, 2022
Principal, loans with governmental agencies	$ 51,295
Loans With Governmental Agencies [Member] | Ministry of Economy and Competitiveness, Debt, Due February 2, 2024 [Member]
Due date, loans with governmental agencies	Feb. 02, 2024
Principal, loans with governmental agencies	$ 273,472	[1]

[1] This loan is secured by $273,472 of cash pledged as collateral by Genasys, which is the current balance of the loan. This amount is included in restricted cash at June 30, 2019. The Company expects the Ministry of Economy and Competitiveness to declare the terms of the loan satisfied within the next twelve months and the outstanding balance of the loan will be paid in full during fiscal 2019. Accordingly, this has been included in the current portion of notes payable as of June 30, 2019.