SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES, Unearned Revenue (Q1) (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2024 |
Dec. 31, 2023 |
|
| Accounting Policies [Abstract] | ||
| Unearned revenue recognized | $ 695,900 | $ 386,900 |
| Deferred revenue reorganization period | 12 months | 12 months |