Note 6 - Recent Acquisition, Goodwill, In-process Research and Development and Other Intangible Assets - Components of Finite-lived Intangible Assets (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Gross amount	$ 8,265
Accumulated amortization	1,214
Net carrying value	7,051
AZEDRA Product Rights [Member]
Gross amount	4,900
Accumulated amortization	467
Net carrying value	4,433
Somerset [Member]
Gross amount	1,245
Accumulated amortization	32
Net carrying value	1,213
EXINI Technology [Member]
Gross amount	2,120
Accumulated amortization	715
Net carrying value	$ 1,405