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FAIR VALUE MEASUREMENT (Tables)
9 Months Ended
Sep. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
The Company’s assets and liabilities that are measured at fair value as of September 30, 2020 and December 31, 2019, are classified in the tables below in one of the three categories described in "Note 2 - Fair value measurement" above:
September 30, 2020
(in thousands)
Level 1
Level 2
Level 3
Total
Marketable securities(1)
$1,027 $2,019 $— $3,046 
December 31, 2019
Level 1
Level 2
Level 3
Total
Marketable securities(1)
$1,020 $15,660 $— $16,680 
(1)The Company’s debt securities are traded in markets that are not considered to be active, but are valued based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Accordingly, these assets are categorized as Level 2.