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General (Tables)
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
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):
 
 Liabilities as of March 31, 2021 (unaudited)Assets as of December 31, 2020
 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$72,612 $(381)$90,452 $3,315 
Foreign exchange forward contract derivatives for monetary items included in prepaid expenses and other current assets and accrued expenses and other short-term liabilities$26,765 $(72)$33,977 $17 
Cash, Cash Equivalents and Investments Cash, cash equivalents, marketable securities and short-term deposits consist of the following (in thousands):
 
 As of March 31, 2021
(unaudited)
 Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized Losses
Fair
Value
Cash and cash equivalents    
Money market funds$16,772 $— $— $16,772 
Total$16,772 $— $— $16,772 
Marketable securities
US Treasury securities$28,072 $$— $28,080 
Total$28,072 $$— $28,080 
Short-term deposits
Term bank deposits$42,284 $— $— $42,284 
Total$42,284 $— $— $42,284 
 
 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 $*)$34,117 
Total$34,113 $*)$34,117 
Short-term deposits
Term bank deposits$30,053 $— $— $30,053 
Total$30,053 $— $— $30,053 

*) Represents an amount lower than $1