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Note 2 - Supplemental Balance Sheet Information - Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Property and equipment, gross	$ 2,738	$ 2,561
Less accumulated depreciation	(1,952)	(1,856)
Property and equipment, net	$ 786	705
Equipment [Member]
Estimated useful life (Year)	5 years
Property and equipment, gross	$ 140	105
Leasehold Improvements [Member]
Property and equipment, gross	$ 649	638
Leasehold Improvements [Member] | Minimum [Member]
Estimated useful life (Year)	2 years
Leasehold Improvements [Member] | Maximum [Member]
Estimated useful life (Year)	5 years
Furniture and Fixtures [Member]
Estimated useful life (Year)	7 years
Property and equipment, gross	$ 16	16
Software and Software Development Costs [Member]
Estimated useful life (Year)	3 years
Property and equipment, gross	$ 1,933	$ 1,802

X

- Definition

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

+ References

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- Definition

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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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