Summary of Significant Accounting Policies - Gain on Equity Investments (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Summary of Significant Accounting Policies [Abstract] | |||
| Net gain recognized on equity securities | $ 252,000 | $ 105,000 | $ 347,000 |
| Less: net gain recognized on equity securities sold | 27,000 | 8,000 | 74,000 |
| Unrealized gain recognized on equity securities still held | $ 225,000 | $ 97,000 | $ 273,000 |