LEASES - Information related to operating lease activity (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Operating lease rental expense | |||
| Amortization of right-of-use assets | $ 142,238 | $ 203,298 | $ 216,305 |
| Expense for short-term leases within 12 months | 53,661 | 23,734 | 13,514 |
| Interest of lease liabilities | 8,689 | 12,613 | 12,100 |
| Total operating lease rental expense | $ 204,588 | $ 239,645 | $ 241,919 |