Note 6 - Goodwill, In-process Research and Development and Other Intangible Assets - Components of Finite-lived Intangible Assets (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Gross amount	$ 8,265
Accumulated amortization	2,318
Net carrying value	5,947
AZEDRA Product Rights [Member]
Gross amount	4,900
Accumulated amortization	1,167
Net carrying value	3,733
Somerset [Member]
Gross amount	1,245
Accumulated amortization	223
Net carrying value	1,022
EXINI Technology [Member]
Gross amount	2,120
Accumulated amortization	928
Net carrying value	$ 1,192