Note 10 - Convertible Note - Schedule of Convertible Note (Details) - Secured Convertible Promissory Note [member] - Iliad Research and Trading, L.P. [Member] - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 26, 2019
Debt Instrument, Face Amount	$ 419	$ 2,200
Unamortized discount	(1)
Long-term	418
Less: short-term	418
Long-term

Face (par) amount of debt instrument at time of issuance.

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Amount, after accumulated amortization, of debt discount.

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

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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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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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