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INCOME TAXES - Deferred taxes (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets |  |
Net operating loss carry forwards | $ 4,654,612 | $ 5,053,102
Accrued expenses and reserves | 782,234 | 713,429
Employee stock option expense | 13,311 |
Inventories | 299,276 | 159,405
Deferred income - TIA contract | 14,742,111 | 15,860,880
Capital loss | 188,270 | 67,962
Interest expense limitation |  | 24,572
Deferred tax assets | 20,679,814 | 21,879,350
Deferred tax liabilities |  |
Unrealized gains/losses | 1,194,734 | (1,028,232)
Property, plant, and equipment | (13,199,805) | (14,049,742)
Deferred tax liabilities | (12,005,071) | (15,077,974)
Net deferred assets | 8,674,743 | 6,801,376
Valuation allowance | (282,713) | (282,713)
Net deferred tax assets | $ 8,392,030 | $ 6,518,663

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