Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

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


	As of December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Cash and cash equivalents
Money market funds	$	10,712	$	—	$	—	$	10,712
Total	$	10,712	$	—	$	—	$	10,712

Marketable securities
US Treasury securities	$	34,113	$	4	*)		$	34,117
Total	$	34,113	$	4	*)		$	34,117

Short-term deposits
Term bank deposits	$	30,053	$	—	$	—	$	30,053
Total	$	30,053	$	—	$	—	$	30,053

*) Represents an amount lower than $1.


	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

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 as of				Assets (liabilities) as of
	December 31, 2020				December 31, 2019
	Notional Amount		Fair Value		Notional Amount		Fair Value
Foreign exchange forward contract derivatives in cash flow hedging relationships included in prepaid expenses and other current assets and accrued expenses and other short-term liabilities	$	90,452	$	3,315	$	84,968	$	(470)
Foreign exchange forward contract derivatives for monetary items included in prepaid expenses and other current assets	$	33,977	$	17	$	26,995	$	5