Note 14 - License, Collaboration and Distribution Agreements - Changes in Assets and Liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Contract Liabilities: Deferred Revenue, Balance at beginning of the period
Contract Liabilities: Deferred Revenue, additions	559
Contract Liabilities: Deferred Revenue, deductions
Contract Liabilities: Deferred Revenue, Balance at the end of the period	559
Contract Liabilities: Accrued Liabilities,Balance at beginning of the period	434
Contract Liabilities: Accrued Liabilities, additions	568
Contract Liabilities: Accrued Liabilities, deductions	(691)
Contract Liabilities: Accrued Liabilities, Balance at the end of the period	311
Contract Liabilities, Balance at beginning of the period	434
Contract Liabilities, additions	1,127
Contract Liabilities, deductions	(691)
Contract Liabilities, Balance at the end of the period	$ 870