Note 1 - Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Property and equipment, gross	$ 6,337	$ 5,838
Less - accumulated depreciation	(2,198)	(1,716)
Property and equipment, net	4,139	4,122
Machinery and Equipment [Member]
Property and equipment, gross	2,993	2,516
Leasehold Improvements [Member]
Property and equipment, gross	1,734	1,734
Computer Equipment [Member]
Property and equipment, gross	712	714
Furniture and Fixtures [Member]
Property and equipment, gross	878	874
Construction in Progress [Member]
Property and equipment, gross	$ 20

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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