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Investments (Tables)
6 Months Ended
Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-Sale Investments
The following tables summarize the Company’s debt securities available-for-sale investments at June 30, 2021 and December 31, 2020 (in thousands):

June 30, 2021
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Certificates of deposit$2,028 $$— $2,029 
U.S. Treasury securities375 — — 375 
Commercial paper9,993 — 9,996 
Corporate notes and bonds11,259 (2)11,258 
Total$23,655 $$(2)$23,658 

December 31, 2020
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Certificates of deposit$5,820 $$— $5,825 
U.S. Treasury securities5,908 15 — 5,923 
Commercial paper10,603 — 10,604 
Corporate notes and bonds9,779 (1)9,779 
Total$32,110 $22 $(1)$32,131 
Summary of Maturities of Available-for-sale Investments
The following table summarizes the maturities of the Company’s debt securities available-for-sale investments at June 30, 2021 and December 31, 2020 (in thousands):

June 30, 2021December 31, 2020
Amortized
Cost
Fair ValueAmortized
Cost
Fair Value
Due in less than 1 year$23,655 $23,658 $32,110 $32,131