Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Sales from Continuing Operations to Significant Metals Customers (Details) - Revenue from Contract with Customer Benchmark [Member] - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Customer A [Member]
Segment Reporting Information [Line Items]
Percentage of accounts receivable	24.50%	28.10%	11.80%
Customer B [Member]
Segment Reporting Information [Line Items]
Percentage of accounts receivable	23.40%	18.50%	15.50%
Customer C [Member]
Segment Reporting Information [Line Items]
Percentage of accounts receivable	13.90%
Customer D [Member]
Segment Reporting Information [Line Items]
Percentage of accounts receivable	10.40%
Customer E [Member]
Segment Reporting Information [Line Items]
Percentage of accounts receivable	10.00%	15.90%	9.50%