STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2022

STOCKHOLDERS' EQUITY

Schedule of Stock option activity

			Weighted
		Weighted	average
		average	remaining	Aggregate
		exercise	contractual	Intrinsic
	Number of	price	life	value
	options	$	Years	$
Options outstanding at beginning of period	1,878,168	18.13	6.96	3,861
Options granted	719,050	7.14	—	—
Options exercised		—	—	—
Options expired	(78,692)	17.47	—	—
Options forfeited	(209,098)	13.91	—	—
Options outstanding at end of period	2,309,428	15.12	7.39	253
Options vested and expected to vest at end of period	2,149,618	15.23	7.35	245
Exercisable at end of period	842,507	20.07	5.54	206

Schedule of Restricted Stock option activity

Transactions related to the grant of restricted shares to employees, directors, and non-employees under the above plans during the six-months period ended June 30, 2022, were as follows:

	Number of
	Restricted shares
Restricted shares outstanding at beginning of period	1,094,627
Restricted shares granted	2,322,548
Restricted shares forfeited	(62,172)
Restricted shares outstanding at end of period	3,355,003

Schedule of assumptions used to estimate the fair values of the options granted to employees, directors and non-employees

	Three months ended
	June 30,
	2022				2021
Volatility	91.42	-	92.04	%	95.84	-	95.84	%
Risk-free interest rate	2.89	-	3.00	%	0.01	-	0.01	%
Dividend yield	-		-	%	-		-	%
Expected life (years)	5.81	-	6.00		5.81	-	5.81

Schedule of Compensation cost

The total compensation cost related to all of the Company’s stock-based awards recognized during the six-month period ended June 30, 2022, and 2021 was comprised as follows:

	Six months ended
	June 30,
	2022		2021
	Unaudited
Cost of revenues	$	48	$	37
Research and development		2,048		1,064
Sales and marketing		3,132		2,204
General and administrative		3,744		6,595
Total stock-based compensation expenses	$	8,972	$	9,900