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Note 11 - Debt (Details Textual)	Dec. 31, 2018 USD ($)
Long-term Debt, Current Maturities, Total	$ 292,554
Long-term Debt, Excluding Current Maturities, Total	51,644
Collateral Pledged [Member] | Loan with Ministry of Science and Innovation, Due February 2, 2024 [Member] | Genasys Acquisition [Member] | Loans With Governmental Agencies [Member]
Restricted Cash, Total	$ 275,339

X

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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