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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Note 7 - Acquired Intangible Assets, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		11 Months Ended	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Nov. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortization of Intangible Assets, Total				$ 7,400	$ 1,000	$ 1,000
Impairment of Intangible Assets, Finite-lived				2,439	389	$ 0
In Process Research and Development [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)			$ 0
Impairment of Intangible Assets, Finite-lived				1,414	(0)
Developed Technology Rights [Member]
Impairment of Intangible Assets, Finite-lived				1,025	389
Selling, General and Administrative Expenses [Member]
Impairment of Intangible Assets, Finite-lived					400
Selling, General and Administrative Expenses [Member] \| Developed Technology Rights [Member]
Impairment of Intangible Assets, Finite-lived				$ 1,000	$ 300
Parcus Medical and Arthrosurface [Member]
Finite-lived Intangible Assets Acquired		$ 90,600
Parcus Medical and Arthrosurface [Member] \| Research and Development Expense [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 1,400