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Shareholders’ equity (deficiency) and redeemable convertible preferred shares (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Assumptions Used to Calculate the Fair Value of Options Granted

The fair value of options granted during the year ended December 31, 2021, December 31, 2020 and December 31, 2019 were calculated based on the following average assumptions:


	Year ended December 31,
	2021	2020	2019
Contractual period in years	10	10	10
Volatility	35.9% - 52.7%	45.1% - 50.2%	43.1% - 45.2%
Risk free interest rate	1.3% - 1.4%	0.1% - 1.0%	2.2% - 2.8%
Dividend yield	—% - 5%	0% - 5%	0% - 5%
Exercise price	$0.00 - $8.270	$2.385 - $5.190	$2.485 - $3.533
Fair value of Ordinary Share	5.41 - $8.270	$1.950 - $5.190	$2.032 - $3.533

Schedule of Stock Option Activity

A summary of the Company’s option activity and related information is as follows:


	Number of options	Weighted- average exercise price		Weighted- average remaining contractual term (in years)
Outstanding at December 31, 2020	30,834,504	$	2.724	8.14
Granted	70,678	5.036
Exercised	2,626,573	2.661
Forfeited	2,790,712	2.874
Outstanding at December 31, 2021	25,487,897	$	2.837	7.03
Exercisable at December 31, 2021	16,158,817	$	2.643	6.45


	Number of options	Weighted- average exercise price		Weighted- average remaining contractual term (in years)
Outstanding at December 31, 2019	27,377,797	$	3.033	8.59
Granted	9,909,539	2.215
Exercised	693,101	2.238
Forfeited	5,759,731	3.485
Outstanding at December 31, 2020	30,834,504	2.724		8.14
Exercisable at December 31, 2020	13,828,828	2.618		5.70

Schedule of Nonvested Restricted Stock Units Activity

A summary of the Company’s RSUs activity is as follows:


	December 31, 2021	December 31, 2020
Unvested at beginning of year	893,629	1,898,810
Granted	1,393,208	257,638
Vested*	178,254	805,716
Forfeited	65,059	457,103
Unvested, at end of year	2,043,524	893,629

*229,156 RSUs subject to deferral arrangements (“DSUs”) under the 2019 Restricted Share and Restricted Share Units Plan, that were vested as of Dec-31, 2020, and additional 43,356 DSUs that were vested in 2021 are not included in the count of shares, as according to that plan, upon their vesting they remain as a Share Unit and not converted into shares.

Summary of Stock-Based Compensation

Stock based compensation costs are recorded in the consolidated statements of operations were as follows:


	Year Ended December 31,
	2021		2020		2019

Cost of revenues	$	290	$	304	$	190
Research and development	1,076		1,145		1,212
Sales and marketing	2,332		2,298		2,969
General and administrative	2,782		3,524		8,388
	$	6,480	$	7,271	$	12,759