STOCKHOLDERS' EQUITY - Summary of Warrant activity (Details) - Warrant [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Class of Warrant or Right [Line Items]
Options Outstanding at the beginning	85,000
Options Outstanding at the beginning (in dollars per share)	$ 5
Granted	150,095	85,000
Granted (in dollars per share)	$ 6.40	$ 5
Exercised	(42,676)
Options Outstanding at the end	192,419	85,000
Options Outstanding at the end (in dollars per share)	$ 5.84	$ 5