v3.26.1
Note 3 - Segment Information - Schedule of Other Segment Disclosures (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Interest revenue (a) [1] $ 412 $ 428 $ 801 $ 845
Amortization (b) [2] 5 5 11 11
Stock-based compensation (c) [3] 160 17 848 26
Capital expenditures 0 0 0 0
Corporate Segment [Member]        
Interest revenue (a) [1] 173 166 339 336
Amortization (b) [2] 0 0 0 0
Stock-based compensation (c) [3] 160 17 848 26
Capital expenditures 0 0 0 0
Operating Segments [Member]        
Interest revenue (a) [1] 412 428 801 845
Amortization (b) [2] 5 5 11 11
Stock-based compensation (c) [3] 160 17 848 26
Capital expenditures 0 0 0 0
Operating Segments [Member] | Electronic Instruments [Member]        
Interest revenue (a) [1] 0 0 0 0
Amortization (b) [2] 5 5 11 11
Stock-based compensation (c) [3] 0 0 0 0
Capital expenditures 0 0 0 0
Operating Segments [Member] | Merchant Investment [Member]        
Interest revenue (a) [1] 239 262 462 509
Amortization (b) [2] 0 0 0 0
Stock-based compensation (c) [3] 0 0 0 0
Capital expenditures 0 0 0 0
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]        
Interest revenue (a) [1] 0 0 0 0
Amortization (b) [2] 0 0 0 0
Stock-based compensation (c) [3] 0 0 0 0
Capital expenditures $ 0 $ 0 $ 0 $ 0
[1] Interest revenue is included in Net investment income on the Condensed Consolidated Statements of Operations.
[2] Amortization is included within the other segment expense captions, such as Manufacturing cost of sales, Engineering, or Other segment items.
[3] Stock-based compensation is included within the Compensation expense caption.