STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Stock option activity

				Weighted Average
	Options on					Remaining		Aggregate
	Common			Exercise		Contractual		Intrinsic
	Shares			Price		Term		Value
Outstanding December 31, 2019		2,928,750		$	2.96		3.71
Granted		381,336		$	4.37		-
Exercised		(293,250	)	$	1.76		-
Forfeited, cancelled, expired		(50,000	)	$	3.00		-
Outstanding June 30, 2020		2,966,836		$	3.26		4.08	$	21,409,000
Vested and exercisable at June 30, 2020		1,984,667		$	2.42		3.09	$	15,999,867

Assumptions used to to determine the fair value of the options granted

	For the Six Months
	Ended June 30,
	2020	2019
Expected stock price volatility	45%	49%
Risk-free interest rate	0.42%	2.41%
Forfeiture rate	0%	0%
Expected dividend yield	0%	0%
Expected life of options - years	6.03	3.50
Weighted-average fair value of options granted	$1.86	$2.06

Service-based RSU activity

				Weighted Average
	Service-Based			Grant Date		Vesting
	RSU's			Fair Value		Period
Unvested at January 1, 2020		308,087		$	6.77
Granted - service based		196,214		$	4.72	3 Years
Granted - performance based		35,211		$	4.72
Vested		(86,558	)	$	7.24
Forfeited and cancelled		(3,416	)	$	7.24
Unvested at June 30, 2020		449,538		$	5.62

Stock-based compensation

	For the Three Months				For the Six Months
	Ended June 30,				Ended June 30,
	2020		2019		2020		2019
Selling, general and administrative	$	496,036	$	345,217	$	925,134	$	548,417
Research and development		52,953		28,634		91,101		52,481
Total stock-based expense	$	548,989	$	373,851	$	1,016,235	$	600,898