Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	1 Months Ended				3 Months Ended		12 Months Ended
	Mar. 31, 2024	Oct. 31, 2023	Sep. 30, 2022	Nov. 30, 2021	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts Receivable, Allowance for Credit Loss	$ 207				$ 207		$ 129
Inventory Valuation Reserves	66				66		76
Payments to Acquire Intangible Assets					1,868	$ (0)
Finite-Lived Intangible Assets, Accumulated Amortization	1,506				1,506
Amortization of Intangible Assets					220	181
Impairment, Long-Lived Asset, Held-for-Use					0	$ 0
Finance Lease, Liability	0				$ 0		$ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)					5,942,961	5,441,568
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | AnovoRx [Member]
Concentration Risk, Percentage					97.70%	96.30%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | AnovoRx [Member]
Concentration Risk, Percentage					94.80%		97.40%
Carglumic Acid Product Rights [Member]
Payments to Acquire Intangible Assets				$ 3,250
Finite-Lived Intangible Asset, Useful Life (Year)				10 years
Betaine Anhydrous Product Rights [Member]
Payments to Acquire Intangible Assets			$ 2,125
Finite-Lived Intangible Asset, Useful Life (Year)			5 years
Nitisinone Product Rights [Member]
Payments to Acquire Intangible Assets		$ 650
Finite-Lived Intangible Asset, Useful Life (Year)		5 years
PKU GoLike [Member]
Payments to Acquire Intangible Assets	$ 1,868
Finite-Lived Intangible Asset, Useful Life (Year)	10 years				10 years
Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years				3 years
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years				5 years