Note 6 - Long-term Prepaid Contracts (Details Textual) - USD ($) $ in Thousands	12 Months Ended	17 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Jul. 31, 2024
Prepaid Expense, Noncurrent	$ 647	$ 904	$ 647	$ 1,200
Increase (Decrease) in Prepaid Long Term Contracts	(257)	$ (310)	600
Clinical Activity Trials [Member]
Prepaid Expense, Noncurrent	600		600
Other Deposits [Member]
Prepaid Expense, Noncurrent	$ 100		$ 100

Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_PrepaidExpenseNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant