Equity (Tables)

3 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Schedule of stock-based compensation expenses

	Three Months Ended
	March 31,
		2021		2020
	U.S $ in thousands
Cost of sales	$	634	$	402
Research and development, net		1,424		1,556
Selling, general and administrative		5,147		2,949
Total stock-based compensation expenses	$	7,205	$	4,907

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		(137,220	)		21.01
Forfeited		(13,439	)		36.26
Options outstanding as of March 31, 2021		1,998,236			27.91
Options exercisable as of March 31, 2021	$	1,619,049		$	30.82

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		1,201,186			34.62
Vested		(533,533	)		22.56
Forfeited		(110,731	)		20.69
Unvested as of March 31, 2021	$	3,358,038		$	25.70

Schedule of accumulated other comprehensive income (loss)

	Three Months Ended March 31, 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 (loss) before reclassifications		1,607			(961	)		646
Amounts reclassified from accumulated other comprehensive loss		566			-			566
Other comprehensive income (loss)		2,173			(961	)		1,212
Balance as of March 31, 2020	$	500		$	(8,134	)	$	(7,634	)

	Three Months Ended March 31, 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		849			(1,954	)		(1,105	)
Amounts reclassified from accumulated other comprehensive loss		(27	)		-			(27	)
Other comprehensive income (loss)		822			(1,954	)		(1,132	)
Balance as of March 31, 2020	$	812		$	(9,660	)	$	(8,848	)