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Note 6 - Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Amortization of Intangible Assets, Total	$ 2,200		$ 200	$ 3,500	$ 500
Impairment of Intangible Assets, Finite-lived				1,025	$ 281	$ (389)
Asset Impairment Charges, Total		$ 0
Parcus Medical and Arthrosurface [Member]
Finite-lived Intangible Assets Acquired		92,900
Parcus Medical and Arthrosurface [Member] | Selling, General and Administrative Expenses [Member]
Impairment of Intangible Assets, Finite-lived		$ 300		$ 1,000

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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