Significant Accounting Policies (Details Textual)		12 Months Ended
	Aug. 21, 2020 USD ($)	Dec. 31, 2021 USD ($) Rate shares	Dec. 31, 2020 USD ($) Rate shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2021 ؋ / shares	May 11, 2020 USD ($)
Significant Accounting Policies [Line Items]
Operating lease, impairment loss		$ 0	$ 0
Contract with customer, liability, revenue recognized		98,085,000
Sales returns		$ 0	0	$ 0
Capitalized contract cost, amortization period (years)		4 years
Stock-based compensation		$ 109,779,000	68,585,000	46,139,000
Gain (loss) on derivative instruments reclassified into earnings, net of tax		8,901,000	(5,795,000)	352,000
Derivative instruments not designated as hedging instruments, gain (loss), net		959,000	(1,144,000)	683,000
Severance and retirement costs		9,598,000	7,169,000	$ 6,390,000
Accumulated deficit		(427,603,000)	(310,742,000)
Additional paid-in capital		1,018,005,000	$ 395,347,000
Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Accumulated deficit		8,647,000
Additional paid-in capital		(30,794,000)
Liabilities		$ 22,146,000
Restricted Stock Units and Stock Options
Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, shares | shares		8,556,245	9,445,326	9,101,154
2025 Senior Notes
Significant Accounting Policies [Line Items]
Debt instrument, face amount		$ 253,000,000
2025 Senior Notes | Convertible Debt Securities
Significant Accounting Policies [Line Items]
Antidilutive securities excluded from computation of earnings per share, shares | shares		8,239,254	8,239,254
Convertible Debt | 2025 Senior Notes
Significant Accounting Policies [Line Items]
Interest rate, stated percentage						1.25%
Debt instrument, face amount						$ 253,000,000
Initial conversion price (in dollars per share) | ؋ / shares					؋ 30.71
Line of Credit | Revolving Credit Facility
Significant Accounting Policies [Line Items]
Debt instrument, term	3 years
Maximum borrowing capacity	$ 70,000,000
Other Noncurrent Liabilities
Significant Accounting Policies [Line Items]
Restructuring reserve		$ 2,877,000	$ 2,727,000
Israel | VSIL Plan
Significant Accounting Policies [Line Items]
Defined contribution plan, maximum annual contributions per employee, percent		8.33%
Deferred Salary Arrangement | United States
Significant Accounting Policies [Line Items]
Defined contribution plan, employer matching contribution, percent of match		100.00%
Defined contribution plan, employer matching contribution, percent of participants contribution		50.00%
Foreign Exchange Contract
Significant Accounting Policies [Line Items]
Gain (loss) on derivative instruments reclassified into earnings, net of tax		$ 8,901,000	$ 257,000	$ 352,000
United States of America, Dollars
Significant Accounting Policies [Line Items]
Investment interest rate | Rate		0.15%
Minimum | Deferred Salary Arrangement | United States
Significant Accounting Policies [Line Items]
Defined contribution plan, contributions, percentage of participants base pay		3.00%
Minimum | United States of America, Dollars
Significant Accounting Policies [Line Items]
Investment interest rate | Rate			0.10%
Maximum | Deferred Salary Arrangement | United States
Significant Accounting Policies [Line Items]
Defined contribution plan, employer matching contribution, percent of base pay		3.00%
Defined contribution plan, contributions, percentage of participants base pay		5.00%
Participant matching contribution percentage of base remuneration		80.00%
Maximum | United States of America, Dollars
Significant Accounting Policies [Line Items]
Investment interest rate | Rate			0.16%
Maintenance and services
Significant Accounting Policies [Line Items]
Revenue, performance obligation, description of timing		one year