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INVESTMENTS (Tables)
 12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-sale Investments
The following tables summarize the Company’s debt securities classified as available-for-sale at December 31 (in thousands):

AVAILABLE-FOR-SALE INVESTMENTS
2022
(in thousands)
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Certificates of deposit$2,548 $— $(7)$2,541 
U.S. Treasury securities3,015 — (6)3,009 
Commercial paper425 — (1)424 
Corporate notes and bonds3,769 — (15)3,754 
Total$9,757 $— $(29)$9,728 

AVAILABLE-FOR-SALE INVESTMENTS
2021
(in thousands)
Amortized CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Fair Value
Certificates of deposit$1,351 $— $— $1,351 
U.S. Treasury securities250 — — 250 
Commercial paper8,048 — (2)8,046 
Corporate notes and bonds13,245 — (13)13,232 
Total$22,894 $— $(15)$22,879 
Schedule of Maturities of Available-for-sale Investments
The following table summarizes the maturities of the Company’s debt securities classified as available-for-sale at December 31 (in thousands):

AVAILABLE-FOR-SALE INVESTMENT MATURITIES
(in thousands)
20222021
Amortized
Cost		Fair ValueAmortized
Cost		Fair Value
Due in less than 1 year$9,757 $9,728 $22,663 $22,649 
Due in 1-5 years— — 231 230 
Total$9,757 $9,728 $22,894 $22,879 
Schedule of Unrealized Losses or Gains on Equity Securities Unrealized losses or gains on equity securities recorded in income during the year ended December 31, 2022, 2021 and 2020 were as follows (in thousands):
202220212020
Unrealized loss on equity investments$(211)$— $—