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Investments - Available-for-Sale

12 Months Ended

Dec. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Investments - Available-for-SaleInvestments available-for-sale consisted of the following as of December 31, 2020 and 2019 (table in thousands):


	December 31, 2020
	Amortized Cost		Unrealized Gain		Unrealized Loss		Accrued Interest Income		Fair Value
Available-for-Sale Securities
Bonds	$	9,987	$	3	$	—	$	7	$	9,997


	December 31, 2019
	Amortized Cost		Unrealized Gain		Unrealized Loss		Accrued Interest Income		Fair Value
Available-for-Sale Securities
Bonds	$	14,238	$	13	$	(1)	$	—	$	14,250

The fair value of investments available-for-sale are determined using quoted market prices from daily exchange-traded markets based on the closing price as of the balance sheet date and are classified as Level 1, as described in Note 3, Fair Value Measurement to our consolidated financial statements.

As of December 31, 2020 and 2019, the amortized cost and estimated fair value of our available-for-sale securities were due in one year or less.