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Note 3 - Segment Information (Tables) | 6 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended June 30, 2025
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Consolidated
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 491 |  |  | $ | — |  |  | $ | — |  |  | $ | 491 |
Net investment income |  |  | — |  |  |  | 262 |  |  |  | 166 |  |  |  | 428 |
Net gains (losses) |  |  | — |  |  |  | — |  |  |  | 5 |  |  |  | 5 |
Total revenues |  |  | 491 |  |  |  | 262 |  |  |  | 171 |  |  |  | 924 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manufacturing cost of sales |  |  | 211 |  |  |  | — |  |  |  | — |  |  |  | 211 |
Engineering |  |  | 57 |  |  |  | — |  |  |  | — |  |  |  | 57 |
Commissions |  |  | 21 |  |  |  | — |  |  |  | — |  |  |  | 21 |
Sales and marketing |  |  | 35 |  |  |  | — |  |  |  | — |  |  |  | 35 |
Accounting |  |  | — |  |  |  | — |  |  |  | 50 |  |  |  | 50 |
Compensation |  |  | 52 |  |  |  | — |  |  |  | 157 |  |  |  | 209 |
Corporation allocations (a) |  |  | 11 |  |  |  | 93 |  |  |  | (104 | ) |  |  | — |
Other segment items (b) |  |  | 36 |  |  |  | 21 |  |  |  | 315 |  |  |  | 372 |
Engineering, selling and administrative |  |  | 212 |  |  |  | 114 |  |  |  | 418 |  |  |  | 744 |
Total expenses |  |  | 423 |  |  |  | 114 |  |  |  | 418 |  |  |  | 955 |
Segment profit (loss) |  | $ | 68 |  |  | $ | 148 |  |  | $ | (247 | ) |  | $ | (31 | )
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Loss from operations before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | (31 | )
|  | Three Months Ended June 30, 2024
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Consolidated
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 531 |  |  | $ | — |  |  | $ | — |  |  | $ | 531 |
Net investment income |  |  | — |  |  |  | 315 |  |  |  | 223 |  |  |  | 538 |
Net gains (losses) |  |  | — |  |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Total revenues |  |  | 531 |  |  |  | 315 |  |  |  | 222 |  |  |  | 1,068 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manufacturing cost of sales |  |  | 214 |  |  |  | — |  |  |  | — |  |  |  | 214 |
Engineering |  |  | 48 |  |  |  | — |  |  |  | — |  |  |  | 48 |
Commissions |  |  | 36 |  |  |  | — |  |  |  | — |  |  |  | 36 |
Sales and marketing |  |  | 47 |  |  |  | — |  |  |  | — |  |  |  | 47 |
Accounting |  |  | — |  |  |  | — |  |  |  | 32 |  |  |  | 32 |
Compensation |  |  | 62 |  |  |  | — |  |  |  | 146 |  |  |  | 208 |
Corporation allocations (a) |  |  | 10 |  |  |  | 77 |  |  |  | (87 | ) |  |  | — |
Other segment items (b) |  |  | 40 |  |  |  | 1 |  |  |  | 205 |  |  |  | 246 |
Engineering, selling and administrative |  |  | 243 |  |  |  | 78 |  |  |  | 296 |  |  |  | 617 |
Total expenses |  |  | 457 |  |  |  | 78 |  |  |  | 296 |  |  |  | 831 |
Segment profit (loss) |  | $ | 74 |  |  | $ | 237 |  |  | $ | (74 | ) |  | $ | 237 |
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Loss from operations before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 237 |
|  | Six Months Ended June 30, 2025 |
|  | Electronic Instruments |  | Merchant Investment |  |  | Corporate |  |  | Consolidated |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 989 |  |  | $ | — |  |  | $ | — |  |  | $ | 989 |
Net investment income |  |  | — |  |  |  | 509 |  |  |  | 336 |  |  |  | 845 |
Net gains (losses) |  |  | — |  |  |  | — |  |  |  | 8 |  |  |  | 8 |
Total revenues |  |  | 989 |  |  |  | 509 |  |  |  | 344 |  |  |  | 1,842 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manufacturing cost of sales |  |  | 448 |  |  |  | — |  |  |  | — |  |  |  | 448 |
Engineering |  |  | 114 |  |  |  | — |  |  |  | — |  |  |  | 114 |
Commissions |  |  | 40 |  |  |  | — |  |  |  | — |  |  |  | 40 |
Sales and marketing |  |  | 92 |  |  |  | — |  |  |  | — |  |  |  | 92 |
Accounting |  |  | — |  |  |  | — |  |  |  | 125 |  |  |  | 125 |
Compensation |  |  | 108 |  |  |  | — |  |  |  | 349 |  |  |  | 457 |
Corporation allocations (a) |  |  | 22 |  |  |  | 186 |  |  |  | (208 | ) |  |  | — |
Other segment items (b) |  |  | 78 |  |  |  | 22 |  |  |  | 456 |  |  |  | 556 |
Engineering, selling and administrative |  |  | 454 |  |  |  | 208 |  |  |  | 722 |  |  |  | 1,384 |
Total expenses |  |  | 902 |  |  |  | 208 |  |  |  | 722 |  |  |  | 1,832 |
Segment profit (loss) |  | $ | 87 |  |  | $ | 301 |  |  | $ | (378 | ) |  | $ | 10 |
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Income from operations before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 10 |
|  | Six Months Ended June 30, 2024
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Consolidated
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 923 |  |  | $ | — |  |  | $ | — |  |  | $ | 923 |
Net investment income |  |  | — |  |  |  | 604 |  |  |  | 433 |  |  |  | 1,037 |
Net gains (losses) |  |  | — |  |  |  | — |  |  |  | (4 | ) |  |  | (4 | )
Total revenues |  |  | 923 |  |  |  | 604 |  |  |  | 429 |  |  |  | 1,956 |
Less: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Manufacturing cost of sales |  |  | 418 |  |  |  | — |  |  |  | — |  |  |  | 418 |
Engineering |  |  | 87 |  |  |  | — |  |  |  | — |  |  |  | 87 |
Commissions |  |  | 55 |  |  |  | — |  |  |  | — |  |  |  | 55 |
Sales and marketing |  |  | 80 |  |  |  | — |  |  |  | — |  |  |  | 80 |
Accounting |  |  | — |  |  |  | — |  |  |  | 188 |  |  |  | 188 |
Compensation |  |  | 120 |  |  |  | — |  |  |  | 276 |  |  |  | 396 |
Corporation allocations (a) |  |  | 19 |  |  |  | 126 |  |  |  | (145 | ) |  |  | — |
Other segment items (b) |  |  | 68 |  |  |  | 1 |  |  |  | 347 |  |  |  | 416 |
Engineering, selling and administrative |  |  | 429 |  |  |  | 127 |  |  |  | 666 |  |  |  | 1,222 |
Total expenses |  |  | 847 |  |  |  | 127 |  |  |  | 666 |  |  |  | 1,640 |
Segment profit (loss) |  | $ | 76 |  |  | $ | 477 |  |  | $ | (237 | ) |  | $ | 316 |
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items |  |  |  |  |  |  |  |  |  |  |  |  |  |  | — |
Income from operations before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 316 |
Segment, Reconciliation of Other Items from Segments to Consolidated [Table Text Block] |
|  | Three Months Ended June 30, 2025
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Interest revenue (a) |  | $ | — |  |  | $ | 262 |  |  | $ | 166 |  |  | $ | 428 |  |  | $ | — |  |  | $ | 428 |
Amortization (b) |  |  | 5 |  |  |  | — |  |  |  | — |  |  |  | 5 |  |  |  | — |  |  |  | 5 |
Other significant non-cash items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation (c) |  |  | — |  |  |  | — |  |  |  | 17 |  |  |  | 17 |  |  |  | — |  |  |  | 17 |
Capital expenditures |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | Three Months Ended June 30, 2024
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Interest revenue (a) |  | $ | — |  |  | $ | 315 |  |  | $ | 223 |  |  | $ | 538 |  |  | $ | — |  |  | $ | 538 |
Amortization (b) |  |  | 6 |  |  |  | — |  |  |  | — |  |  |  | 6 |  |  |  | — |  |  |  | 6 |
Other significant non-cash items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation (c) |  |  | — |  |  |  | — |  |  |  | 9 |  |  |  | 9 |  |  |  | — |  |  |  | 9 |
Capital expenditures |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | Six Months Ended June 30, 2025 |
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Interest revenue (a) |  | $ | — |  |  | $ | 509 |  |  | $ | 336 |  |  | $ | 845 |  |  | $ | — |  |  | $ | 845 |
Amortization (b) |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | 11 |  |  |  | — |  |  |  | 11 |
Other significant non-cash items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation (c) |  |  | — |  |  |  | — |  |  |  | 26 |  |  |  | 26 |  |  |  | — |  |  |  | 26 |
Capital expenditures |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | Six Months Ended June 30, 2024
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Interest revenue (a) |  | $ | — |  |  | $ | 604 |  |  | $ | 433 |  |  | $ | 1,037 |  |  | $ | — |  |  | $ | 1,037 |
Amortization (b) |  |  | 11 |  |  |  | — |  |  |  | — |  |  |  | 11 |  |  |  | — |  |  |  | 11 |
Other significant non-cash items: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation (c) |  |  | — |  |  |  | — |  |  |  | 18 |  |  |  | 18 |  |  |  | — |  |  |  | 18 |
Capital expenditures |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
|  | June 30, 2025
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Total assets |  | $ | 1,072 |  |  | $ | 25,235 |  |  | $ | 16,723 |  |  | $ | 43,030 |  |  | $ | — |  |  | $ | 43,030 |
|  | December 31, 2024
|  | Electronic Instruments |  | Merchant Investment |  | Corporate |  | Total |  | Adjustments and Reconciling Items |  | Consolidated
Total assets |  | $ | 1,249 |  |  | $ | 24,748 |  |  | $ | 17,148 |  |  | $ | 43,145 |  |  | $ | — |  |  | $ | 43,145 |

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