Note 5 - Marketable Securities

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

5. Marketable Securities

The cost of marketable securities sold is based upon the specific identification method. During the year ended December 31, 2021, the Company recorded the following realized (loss) from the sale of available-for-sale marketable securities ($0 during the year ended December 31, 2020 or 2019) (in thousands):

Sales proceeds	$	79,574
Amortized cost		(79,664	)
Realized (loss)	$	(90	)

Interest receivable related to the marketable securities of $1.5 million was included within "Prepaid expenses and other current assets" on the accompanying Consolidated Balance Sheets as of December 31, 2021 ($0 at December 31, 2020).

Interest income totaled $0.5 million the year ended December 31, 2021 (nil during the years ended December 31, 2020 and 2019) and is included in "Interest and dividend income" in the Consolidated Statements of Operations.

Future maturities of the Company's marketable securities are $275.3 million in 2022 and $64.4 million in 2023.