STOCKHOLDERS' EQUITY - Company's Option Activity (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted outside of the plan	309,564
Vested and exercisable	61,943
Weighted-Average Exercise Price vested and exercisable	$ 7.72
Aggregate intrinsic value vested and exercisable	$ 3,675
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding Available For Grant at the beginning	463,250
Options Outstanding at the beginning	136,750
Options Outstanding at the beginning (in dollars per share)	$ 4.96
Weighted-Average Grant Date Fair Value Beginning	$ 2.27
Options granted	(238,000)	462,500
Granted	238,000	137,500
Granted (in dollars per share)	$ 8.66	$ 4.96
Options granted	$ 5.79	$ 2.27
[custom:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm]	9 years 9 months	10 years
Options forfeited/cancelled	95,000	750
Options forfeited/cancelled	(95,000)	(750)
Weighted Average Exercise Price Forfeited	$ 9.69	$ 5.00
Option exercised
Options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	9 years 5 months 26 days	9 years 11 months 12 days
Options granted outside of the plan
Options granted outside of the plan exercise price	$ 7.80
Options granted outside of the plan	$ 5.06
[custom:OptionsGrantedOutsideOfPlanContractualLife]	9 years 5 months 1 day
Options Outstanding Available For Grant at the ending	320,250	463,250
Options Outstanding at the end	589,314	136,750
Options Outstanding at the end (in dollars per share)	$ 7.57	$ 4.96
Weighted-Average Grant Date Fair Value ending		$ 2.27
Aggregate intrinsic value	$ 296,175