Note 1 - Basis of Presentation (Details Textual) - shares		3 Months Ended
	Sep. 27, 2022	Sep. 30, 2022
Effective Income Tax Rate Reconciliation, Percent, Total		0.00%
Viewpoint Molecular Targeting, Inc. [Member] | Isoray Acquisition Corp. [Member]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Per Share (in shares)	3.3212
Business Acquisition, Percentage of Voting Interests Acquired	49.00%
Number of Board of Directors	4
Number of Board of Directors Appointed by Parent Company	3
Number of Board of Directors Appointed by Acquirer	2
Viewpoint Molecular Targeting, Inc. [Member] | Isoray Acquisition Corp. [Member] | Minimum [Member]
Number of Board of Directors Appointed by Parent Company	5