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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Goodwill, Impairment Loss		$ 0
Impairment of Long-Lived Assets Held-for-use		0
Operating Lease, Liability, Total		10,648
Operating Lease, Right-of-Use Asset		8,463
Long-term Debt, Current Maturities, Total		3,200			2,400
Long-term Debt, Excluding Current Maturities, Total		$ 46,917			$ 54,813
Iimmaterial Misclassification Understated Current Portion, Long Term Debt and Overstated Long Term Debt [Member]
Long-term Debt, Current Maturities, Total			$ 4,000
Long-term Debt, Excluding Current Maturities, Total			$ (4,000)
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total				$ 11,700
Operating Lease, Right-of-Use Asset				$ 9,400
Existing Technology [Member]
Finite-Lived Intangible Asset, Useful Life	[1]	6 years 36 days
Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life	[1]	6 years 292 days
Minimum [Member]
Customer Payments Term		0 years
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		1 year
Minimum [Member] | Existing Technology [Member]
Finite-Lived Intangible Asset, Useful Life		7 years
Minimum [Member] | Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life		10 years
Minimum [Member] | Distribution Rights [Member]
Finite-Lived Intangible Asset, Useful Life		4 years
Minimum [Member] | In Process Research and Development [Member]
Finite-Lived Intangible Asset, Useful Life		5 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life		5 years
Maximum [Member]
Customer Payments Term		60 days
Maximum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		4 years
Maximum [Member] | Existing Technology [Member]
Finite-Lived Intangible Asset, Useful Life		15 years
Maximum [Member] | Trade Names [Member]
Finite-Lived Intangible Asset, Useful Life		15 years
Maximum [Member] | Distribution Rights [Member]
Finite-Lived Intangible Asset, Useful Life		5 years
Maximum [Member] | In Process Research and Development [Member]
Finite-Lived Intangible Asset, Useful Life		15 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life		15 years
[1] Weighted average life as of December 31, 2019.

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