Note 6 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property and equipment, at cost	$ 733	$ 714
Less: accumulated depreciation and amortization	(462)	(243)
Total property and equipment, net	271	471
Equipment [Member]
Property and equipment, at cost	24	24
Furniture and Fixtures [Member]
Property and equipment, at cost	157	157
Computer Equipment and Software [Member]
Property and equipment, at cost	370	354
Production Equipment [Member]
Property and equipment, at cost	105	105
Leasehold Improvements [Member]
Property and equipment, at cost	$ 77	$ 74

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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