XML 21 R10.htm IDEA: XBRL DOCUMENT v3.22.0.1
Marketable Securities
 12 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities Marketable Securities
Marketable securities as of December 31, 2021 and 2020 consisted of the following:
December 31, 2021Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Money market mutual funds$13,147 $— $— $13,147 
Total marketable securities designated as available-for-sale$13,147 $— $— $13,147 
 
December 31, 2020Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Value
Money market mutual funds$20,142 $— $— $20,142 
United States treasuries4,999 — — 4,999 
Total marketable securities designated as available-for-sale$25,141 $— $— $25,141 
The effective maturity date of the United States treasuries is less than one year.
Interest income from marketable securities was $6 and $135 for the years ended December 31, 2021 and 2020, respectively.