Shareholder Report, Average Annual Return (Details) |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| C000162171 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Value Line Capital Appreciation Fund Inc.-Institutional Class | ||
| C000020636 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Value Line Capital Appreciation Fund Inc.-Investor Class | ||
| Without Sales Load [Member] | C000162171 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 21.07% | 8.36% | 12.14% |
| Without Sales Load [Member] | C000020636 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 20.87% | 8.10% | 11.86% |
| VALUELINE INDEX: S&P 500® | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | ||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% |
| VALUELINE INDEX: S&P 500® | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index | ||
| Average Annual Return, Percent | 17.88% | 14.42% | 14.82% |
| 60/40 S&P 500® Index/Bloomberg US Aggregate Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | 60/40 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index/Bloomberg US Aggregate Bond Index | ||
| Average Annual Return, Percent | 13.70% | 8.47% | 9.78% |
| 60/40 S&P 500® Index/Bloomberg US Aggregate Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | 60/40 S&P 500<sup style="inset: 1.5px 0px 4px; box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center; text-align-last: auto; white-space-collapse: preserve-breaks;">®</sup> Index/Bloomberg US Aggregate Bond Index | ||
| Average Annual Return, Percent | 13.70% | 8.47% | 9.78% |