Condensed Income Statements (Unaudited) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jan. 31, 2026 |
Jan. 31, 2025 |
Jan. 31, 2026 |
Jan. 31, 2025 |
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| Income Statement [Abstract] | ||||
| Net Sales | $ 5,659,000 | $ 4,912,000 | $ 17,889,000 | $ 16,306,000 |
| Less: Cost of Goods Sold | (3,092,000) | (2,614,000) | (9,330,000) | (8,349,000) |
| Gross Profit | 2,567,000 | 2,298,000 | 8,559,000 | 7,957,000 |
| Operating Expenses | ||||
| General and Administrative | 375,000 | 344,000 | 1,111,000 | 1,098,000 |
| Sales | 839,000 | 726,000 | 2,454,000 | 2,320,000 |
| Engineering | 35,000 | 32,000 | 81,000 | 86,000 |
| Total Operating Expenses | 1,249,000 | 1,102,000 | 3,646,000 | 3,504,000 |
| Income From Operations | 1,318,000 | 1,196,000 | 4,913,000 | 4,453,000 |
| Other Income (Expense) | ||||
| Other | 1,000 | 66,000 | 97,000 | |
| Dividend and Interest Income | 683,000 | 536,000 | 1,312,000 | 1,152,000 |
| Unrealized Gain on equity securities | 369,000 | 92,000 | 3,662,000 | 1,505,000 |
| Gain on Sale of Investments | 511,000 | 341,000 | 777,000 | 890,000 |
| Gain on Solar Tax Credit | 134,000 | 95,000 | 134,000 | 468,000 |
| (Loss) on Sale of Assets | (30,000) | (2,000) | ||
| Total Other Income | 1,697,000 | 1,065,000 | 5,921,000 | 4,110,000 |
| Income Before Provisions for Income Taxes | 3,015,000 | 2,261,000 | 10,834,000 | 8,563,000 |
| Provisions for Income Taxes: | ||||
| Current Expense | 452,000 | 602,000 | 1,441,000 | 1,771,000 |
| Deferred Tax Expense | 83,000 | 52,000 | 778,000 | 264,000 |
| Total Income Tax Expense | 535,000 | 654,000 | 2,219,000 | 2,035,000 |
| Net Income | $ 2,480,000 | $ 1,607,000 | $ 8,615,000 | $ 6,528,000 |
| Income Per Share of Common Stock | ||||
| Basic | $ 0.51 | $ 0.33 | $ 1.76 | $ 1.33 |
| Diluted | $ 0.51 | $ 0.33 | $ 1.75 | $ 1.33 |
| Weighted Average Number of Common Shares Outstanding | ||||
| Basic | 4,889,160 | 4,895,382 | 4,890,785 | 4,896,281 |
| Diluted | 4,910,355 | 4,915,882 | 4,911,980 | 4,916,781 |
| X | ||||||||||
- Definition Engineering expenses. No definition available.
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- Definition Gain loss on solar tax credit. No definition available.
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of unrealized gain (loss) on investment in marketable security. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of income related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Expenses recognized in the period that are directly related to the selling and distribution of products or services. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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