SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - breakdown of the StartEngine Private assets held by industry (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	$ 4,912,225	$ 4,357,083
AI Chips
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	1,717,081
Fusion Power
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	40,191
Medical Technology
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	257,500
Consumer Goods
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	457,650
Fintech
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	280,579
AI Software
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	1,436,681
Sales Technology
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Investments - Private	$ 722,543