Equity (Tables)

9 Months Ended

Sep. 30, 2021

Stockholders' Equity Note [Abstract]

Schedule of stock-based compensation expenses

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
		2021		2020		2021		2020
	U.S $ in thousands				U.S $ in thousands
Cost of revenues	$	805	$	524	$	2,227	$	1,370
Research and development, net		1,764		1,587		5,058		3,764
Selling, general and administrative		5,389		2,765		15,855		10,623
Total stock-based compensation expenses	$	7,958	$	4,876	$	23,140	$	15,757

Schedule of stock option activity

	Number of Options			Weighted Average Exercise Price
Options outstanding as of January 1, 2021	2,102,529		$	28.06
Granted	46,366			3.15
Exercised	(209,819	)		20.05
Forfeited	(40,548	)		41.82
Options outstanding as of September 30, 2021	1,898,528			28.04
Options exercisable as of September 30, 2021	1,569,587		$	30.66

Schedule of RSUs and PSUs activity

	Number of RSUs and PSUs			Weighted Average Grant Date Fair Value
Unvested as of January 1, 2021	2,801,116		$	21.08
Granted	1,272,386			33.91
Vested	(709,434	)		21.88
Forfeited	(284,276	)		21.98
Unvested as of September 30, 2021	3,079,792		$	26.11

Schedule of accumulated other comprehensive income (loss)

	Nine Months Ended September 30, 2021
		Net Unrealized Gain (Loss) on Cash Flow Hedges			Foreign Currency Translation Adjustments			Total
	U.S. $ in thousands
Balance as of January 1, 2021	$	(1,673	)	$	(7,173	)	$	(8,846	)
Other comprehensive income before reclassifications		2,427			(2,105	)		322
Amounts reclassified from accumulated other comprehensive loss		152			-			152
Other comprehensive income		2,579			(2,105	)		474
Balance as of September 30, 2021	$	906		$	(9,278	)	$	(8,372	)

	Nine Months Ended September 30, 2020
		Net Unrealized Gain (Loss) on Cash Flow Hedges			Foreign Currency Translation Adjustments			Total
	U.S. $ in thousands
Balance as of January 1, 2020	$	(10	)	$	(7,706	)	$	(7,716	)
Other comprehensive income (loss) before reclassifications		(299	)		(611	)		(910	)
Amounts reclassified from accumulated other comprehensive loss		(663	)		-			(663	)
Other comprehensive income (loss)		(962	)		(611	)		(1,573	)
Balance as of September 30, 2020	$	(972	)	$	(8,317	)	$	(9,289	)