Note 4 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Gross property and equipment	$ 29,446	$ 26,270
Less accumulated depreciation	(15,344)	(13,892)
Property and equipment, net	14,102	12,378
Computers and Equipment [Member]
Gross property and equipment	4,077	3,204
Machinery and Equipment [Member]
Gross property and equipment	13,718	12,223
Building and Leasehold Improvements [Member]
Gross property and equipment	$ 11,651	$ 10,843

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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