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Note 1 - Overview of Operations and Basis for Presentation (Details Textual)
Sep. 30, 2025
Number of Subsidiaries 2
PC Group, Inc. [Member] | UTAH  
Noncontrolling Interest, Ownership Percentage by Parent 98.76%
PC Group, Inc. [Member] | GERMANY  
Noncontrolling Interest, Ownership Percentage by Parent 100.00%