Note 4 - Acquisition of Grace - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Aug. 27, 2021	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Goodwill	$ 12,964
Grace Therapeutics Inc Member
Restructuring Cost and Reserve [Line Items]
Cash and equivalents		$ 90
Prepaid expenses and other current assets		74
Intangible assets in process research and development		69,810
Goodwill	12,964	12,964
Accounts payable and accrued expenses		(4,578)
Deferred tax liability	$ (17,536)	(17,536)
Total assets acquired and liabilities assumed		$ 60,824