Financial Instruments

3 Months Ended

Mar. 31, 2023

Financial Instruments

Financial Instruments

5. Financial Instruments

The Company elected to invest a portion of its cash assets in conservative, income earning, and liquid investments. Cash equivalents and investments, all of which are classified as available-for-sale securities, consisted of the following:

	March 31, 2023						December 31, 2022
	Amortized Cost		Gross Unrealized Loss		Estimated Fair Value		Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss		Estimated Fair Value
	(in thousands)
Money market deposits	$	246,954	$	—	$	246,954	$	283,358	$	—	$	—	$	283,358
Liquid demand deposits		126,986		—		126,986		125,596		—		—		125,596
U.S. Treasury securities (1)		342,958		(8,554)		334,404		358,385		—		(12,328)		346,057
Corporate bonds and notes (1)		19,014		(295)		18,719		24,045		—		(516)		23,529
Municipal securities		58,388		(2,653)		55,735		65,973		1		(3,259)		62,715
Total	$	794,300	$	(11,502)	$	782,798	$	857,357	$	1	$	(16,103)	$	841,255
Classified as:
Cash equivalents (2)						373,940								408,954
Short-term investments						408,858								432,301
Total					$	782,798							$	841,255

(1) Per the Company’s investment policy, all debt securities are classified as short-term investments irrespective of holding period.  

(2) Cash equivalents includes money market deposits and liquid demand deposits.

The Company invests in U.S. Treasuries, U.S. agency and high-quality municipal bonds which mature at par value and are all paying their coupons on schedule. The Company has therefore concluded there is currently no other than temporary impairment of its investments and will continue to recognize unrealized gains and losses in other comprehensive income (loss). During the three months ended March 31, 2023, the Company did not sell any investments. The Company uses the specific investment identification method to calculate realized gains and losses and amounts reclassified out of other comprehensive income to net income. As of March 31, 2023, the Company had 56 investments in an unrealized loss position in its portfolio. An allowance for credit losses was not necessary as the decrease in the fair market value for a majority of the available-for-sale securities was as a result of a significant average yield rate increase for similar securities as of March 31, 2023. The Company has assessed the unrealized loss position for available-for-sale debt securities for which an allowance for credit losses has not been recorded and concluded any such losses are temporary and not indicative of an impairment.

The following table presents debt securities available-for-sale that were in an unrealized loss position as of March 31, 2023, aggregated by major security type in a continuous loss position. There were no debt securities available-for-sale in an unrealized loss position for less than 12 months as of March 31, 2023.

	Total
	Fair Value		Unrealized Loss
U.S. Treasury securities	$	334,404	$	(8,554)
Corporate bonds and notes		18,719		(295)
Municipal securities		55,735		(2,653)
Total	$	408,858	$	(11,502)

The following table summarizes the Company’s portfolio of available-for-sale securities by contractual maturity as of March 31, 2023:

	March 31, 2023
	Amortized Cost		Fair Value
	(in thousands)
Less than or equal to one year	$	349,114	$	341,858
Greater than one year but less than five years		71,246		67,000
Total	$	420,360	$	408,858