Note 9 - Cash, Cash Equivalents, Investments and Restricted Cash

9 Months Ended

Sep. 30, 2022

Notes to Financial Statements

Financial Instruments Disclosure [Text Block]

9. CASH, CASH EQUIVALENTS, INVESTMENTS AND RESTRICTED CASH

The following is a summary of the Company’s cash, cash equivalents and debt investments (in thousands): 

	September 30,		December 31,
	2022		2021
Cash	$	245,051	$	174,937
Money market funds		71,159		14,328
Certificates of deposit		126,532		141,478
Corporate debt securities		286,065		386,883
U.S. treasuries and government agency bonds		7,240		7,456
Auction-rate securities backed by student-loan notes		2,083		2,401
Total	$	738,130	$	727,483

	September 30,		December 31,
	2022		2021
Reported as:
Cash and cash equivalents	$	316,210	$	189,265
Short-term investments		419,837		535,817
Investment within other long-term assets		2,083		2,401
Total	$	738,130	$	727,483

The following table summarizes the contractual maturities of the short-term and long-term available-for-sale investments as of September 30, 2022 (in thousands):  

	Amortized Cost		Fair Value
Due in less than 1 year	$	316,904	$	313,134
Due in 1 - 5 years		113,002		106,703
Due in greater than 5 years		2,195		2,083
Total	$	432,101	$	421,920

Gross realized gains and losses recognized on the sales of available-for-sale investments were not material for the periods presented. 

The following tables summarize the unrealized gain and loss positions related to the available-for sale investments (in thousands):  

	September 30, 2022
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Money market funds	$	71,159	$	-	$	-		$	71,159
Certificates of deposit		126,532		-		-			126,532
Corporate debt securities		295,877		-		(9,812	)		286,065
U.S. treasuries and government agency bonds		7,497		-		(257	)		7,240
Auction-rate securities backed by student-loan notes		2,195		-		(112	)		2,083
Total	$	503,260	$	-	$	(10,181	)	$	493,079

	December 31, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Money market funds	$	14,328	$	-	$	-		$	14,328
Certificates of deposit		141,478		-		-			141,478
Corporate debt securities		388,081		570		(1,768	)		386,883
U.S. treasuries and government agency bonds		7,495		-		(39	)		7,456
Auction-rate securities backed by student-loan notes		2,520		-		(119	)		2,401
Total	$	553,902	$	570	$	(1,926	)	$	552,546

The following tables present information about the available-for-sale investments that had been in a continuous unrealized loss position for less than 12 months and for greater than 12 months (in thousands): 

	September 30, 2022
	Less than 12 Months					Greater than 12 Months					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate debt securities	$	203,576	$	(6,236	)	$	81,489	$	(3,576	)	$	285,065	$	(9,812	)
U.S. treasuries and government agency bonds		3,361		(136	)		3,879		(121	)		7,240		(257	)
Auction-rate securities backed by student-loan notes		-		-			2,083		(112	)		2,083		(112	)
Total	$	206,937	$	(6,372	)	$	87,451	$	(3,809	)	$	294,388	$	(10,181	)

	December 31, 2021
	Less than 12 Months					Greater than 12 Months					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate debt securities	$	285,954	$	(1,765	)	$	4,760	$	(3	)	$	290,714	$	(1,768	)
U.S. treasuries and government agency bonds		7,456		(39	)		-		-			7,456		(39	)
Auction-rate securities backed by student-loan notes		-		-			2,401		(119	)		2,401		(119	)
Total	$	293,410	$	(1,804	)	$	7,161	$	(122	)	$	300,571	$	(1,926	)

An impairment exists when the fair value of an investment is less than its amortized cost basis. As of September 30, 2022 and December 31, 2021, the Company did not consider the impairment of its investments to be a result of credit losses. The Company typically invests in highly rated securities, with the primary objective of minimizing the potential risk of principal loss. The Company’s investment policy generally requires securities to be investment grade and limits the amount of credit exposure to any one issuer. When evaluating a debt security for impairment, management reviews factors such as the Company’s intent to sell, or whether it will more likely than not be required to sell, the security before recovery of its amortized cost basis, the extent to which the fair value of the security is less than its cost, the financial condition of the issuer and the credit quality of the investment.

The Company’s auction-rate securities are backed by pools of student loans supported by guarantees by the U.S. Department of Education. The underlying maturities of these securities are up to 24 years. The Company has received all scheduled interest payments on a timely basis pursuant to the terms and conditions of the securities. The Company does not intend to sell these securities, and it is more likely than not that the Company will not be required to sell these securities, before recovery of its amortized cost basis. To date, the Company has redeemed $41.1 million, or 95% of the original portfolio in these auction-rate securities, at par without any realized losses.

Non-Marketable Equity Investment

In  November 2020, the Company made an equity investment in a privately held Swiss company (the “Investee”) that is accounted for under the measurement alternative. In April 2022, the Company made an investment in a convertible loan that will convert into additional shares of the Investee. One member of the Company’s Board of Directors is an executive officer of a company that has a commercial relationship with the Investee. In addition, the Company’s Chief Executive Officer has a personal investment in the Investee and currently serves on the Investee’s board of directors. As of September 30, 2022 and December 31, 2021, the Company’s investment in the Investee, which is denominated in CHF, had a carrying value of $5.1 million and $3.3 million, respectively. The Company did not record any impairment or adjustments resulting from observable price changes for the three and nine months ended September 30, 2022.

Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the amounts reported on the Condensed Consolidated Statements of Cash Flows (in thousands):   

	September 30,		December 31,
	2022		2021
Cash and cash equivalents	$	316,210	$	189,265
Restricted cash included in other long-term assets		115		124
Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows	$	316,325	$	189,389

As of September 30, 2022 and December 31, 2021, restricted cash included a security deposit that is set aside in a bank account and cannot be withdrawn by the Company under the terms of a lease agreement. The restriction will end upon the expiration of the lease.