STOCKHOLDERS' EQUITY - Summary of Warrant activity (Details) - Warrant [Member]	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Number of Shares
Options Outstanding at the beginning	85,000
Granted	150,095
Exercised	(41,926)
Options Outstanding at the end	193,169
Options exercisable at the end	193,169
Weighted-Average Exercise Price
Options Outstanding at the beginning (in dollars per share) | $ / shares	$ 5.00
Granted (in dollars per share) | $ / shares	6.40
Options Outstanding at the end (in dollars per share) | $ / shares	5.80
Options exercisable at the end (in dollars per share) | $ / shares	$ 5.80