Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Cash, Cash Equivalents and Investments

Cash, cash equivalents, marketable securities and short-term deposits consist of the following (in thousands):

	As of December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents
Money market funds	$	4,789	$	—	$	—		$	4,789
Total	$	4,789	$	—	$	—		$	4,789
Marketable securities
US Treasury securities	$	41,510	$	23	$	(2	)	$	41,531
Total	$	41,510	$	23	$	(2	)	$	41,531
Short-term deposits
Term bank deposits	$	10,000	$	—	$	—		$	10,000
Total	$	10,000	$	—	$	—		$	10,000

	As of December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Cash and cash equivalents
Money market funds	$	2,594	$	—	$	—		$	2,594
Total	$	2,594	$	—	$	—		$	2,594
Marketable securities
US Treasury securities	$	39,776	*)		$	(6	)	$	39,770
Total	$	39,776	*)		$	(6	)	$	39,770
Short-term deposits
Term bank deposits	$	70,438	$	—	$	—		$	70,438
Total	$	70,438	$	—	$	—		$	70,438

*) Represents an amount lower than $1.

Property, Plant and Equipment Estimated Useful Life

Depreciation is calculated using the straight-line method over the estimated useful lives of the assets at the following annual rates:

	%
Computer equipment		33%
Office furniture and equipment	14%	—	15%
Leasehold improvements		Over the shorter of the expected lease term or estimated useful life

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

Derivative instruments measured at fair value and their classification on the consolidated balance sheets are presented in the following table (in thousands):

	Assets (liabilities) as of					Liabilities as of
	December 31, 2019					December 31, 2018
	Notional Amount		Fair Value			Notional Amount		Fair Value
Foreign exchange forward contract derivatives in cash flow hedging relationships included in accrued expenses and other short-term liabilities	$	84,968	$	(470	)	$	75,153	$	(3,628	)
Foreign exchange forward contract derivatives for monetary items included in other current assets and accrued expenses and other short-term liabilities	$	26,995	$	5		$	29,162	$	(18	)

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of cash and cash equivalents, and long term restricted cash reported within the consolidated balance sheets that sum to the total of such amounts in the consolidated statements of cash flows:

	December 31, 2019		December 31, 2018		December 31, 2017
Cash and cash equivalents	$	68,929	$	48,707	$	56,689
Long term restricted cash included in other assets	—		—		547
Cash, cash equivalents and long term restricted cash shown in the consolidated statement of cash flows	$	68,929	$	48,707	$	57,236

Restrictions on Cash and Cash Equivalents

The following table provides a reconciliation of cash and cash equivalents, and long term restricted cash reported within the consolidated balance sheets that sum to the total of such amounts in the consolidated statements of cash flows:

	December 31, 2019		December 31, 2018		December 31, 2017
Cash and cash equivalents	$	68,929	$	48,707	$	56,689
Long term restricted cash included in other assets	—		—		547
Cash, cash equivalents and long term restricted cash shown in the consolidated statement of cash flows	$	68,929	$	48,707	$	57,236