Note 3 - Business Combinations - Fair Value of Net Assets Acquired (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Feb. 03, 2020	Jan. 24, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill	$ 33,958			$ 7,694	$ 7,851
Parcus Medical [Member]
Cash and cash equivalents			$ 196
Accounts receivable			2,029
Inventories			9,088
Prepaid expenses and other current assets			364
Property and equipment, net			1,099
Right-of-use assets			944
Intangible assets			44,000
Accounts payable, accrued expenses and other current liabilities			(2,763)
Other long-term liabilities			(594)
Lease liabilities			(735)
Net assets acquired			53,628
Goodwill			21,508
Estimated total purchase consideration			$ 75,136
Arthrosurface [Member]
Cash and cash equivalents		$ 1,072
Accounts receivable		5,368
Inventories		15,652
Prepaid expenses and other current assets		535
Property and equipment, net		3,394
Intangible assets		48,900
Accounts payable, accrued expenses and other current liabilities		(3,929)
Net assets acquired		67,393
Goodwill		22,892
Estimated total purchase consideration		90,285
Other long-term assets		7,548
Deferred tax liabilities	$ (11,200)	$ (11,147)