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Note 4 - Lease Commitments (Details Textual)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Oct. 10, 2018
USD ($)
ft²
Lessee, Operating Lease, Term of Contract (Year)   7 years
Area of Real Estate Property (Square Foot) | ft²   42,685
Collateralized Agreements, Total   $ 1,480
Payments for (Proceeds from) Tenant Allowance $ 640