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Fair-Value Measurements
12 Months Ended
Dec. 31, 2022
Fair-Value Measurements  
Fair-Value Measurements

Note 6—Fair-Value Measurements

As of December 31, 2022, all investments were classified as held-to-maturity and earnings were included in interest and other income. As of December 31, 2021, all investments were classified as short-term and available-for-sale.

On a recurring basis, we measure certain financial assets at fair value. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability, an exit price, in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The accounting standard establishes a fair value hierarchy that requires an entity to maximize the use of observable inputs, where available. The following summarizes the three levels of inputs required:

Level 1—Observable inputs for identical assets or liabilities, such as quoted prices in active markets;

Level 2—Inputs other than quoted prices in active markets that are either directly or indirectly observable; and

Level 3—Unobservable inputs in which little or no market data exists, therefore they are developed using estimates and assumptions developed by us, which reflect those that a market participant would use.

Our fair-value hierarchy for our financial assets are as follows:

    

December 31, 2022

    

Level 1

    

Level 2

    

Level 3

    

Total

(In thousands)

Assets:

Money-market funds classified as short-term investments

$

84,882

$

$

$

84,882

U.S. government treasury bills classified as short-term investments

99,027

99,027

Total short-term investments

183,909

183,909

Money-market funds classified as non-current restricted investments

 

1,054

 

 

 

1,054

Total

$

184,963

$

$

$

184,963

    

December 31, 2021

    

Level 1

    

Level 2

    

Level 3

    

Total

(In thousands)

Assets:

  

 

  

 

  

 

  

Money-market funds classified as short-term investments

$

56,458

$

$

$

56,458

Money-market funds classified as non-current restricted investments

 

1,054

 

 

 

1,054

Total

$

57,512

$

$

$

57,512

Unrealized gains and losses on our short-term investments were not material for either period presented. Cash held in demand deposit accounts of $11.0 million and $100.8 million is excluded from our fair-value hierarchy disclosure as of December 31, 2022 and 2021, respectively. The carrying amounts for receivables, accounts payable and accrued liabilities, and other current monetary assets and liabilities, including lease financing obligations, approximate fair value.

See “Note 8 - Unsecured Convertible Senior Notes” and “Note 9 – OMIDRIA Royalty Obligation” for the carrying amount and estimated fair value of our 5.25% convertible senior notes due 2026, 6.25% convertible senior notes due 2023 and OMIDRIA royalty obligation.