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Fair Value of Financial Instruments
9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
The Company's estimates of fair value for financial assets and financial liabilities are based on the framework established in ASC 820. The framework is based on the inputs used in valuation and gives the highest priority to quoted prices in active markets and requires that observable inputs be used in the valuations when available. The disclosure of fair value estimates in the ASC 820 hierarchy is based on whether the significant inputs into the valuation are observable. In determining the level of the hierarchy in which the estimate is disclosed, the highest priority is given to unadjusted quoted prices in active markets and the lowest priority to unobservable inputs that reflect the Company’s significant market assumptions. We classified our financial instruments measured at fair value on a recurring basis in the following valuation hierarchy.
The Company's assets measured at fair value consisted of the following at September 30, 2023 and December 31, 2022:
Fair Value at September 30, 2023
TotalLevel 1 Level 2Level 3
Assets:
Investments in equity securities 189 178 — 11 
Total assets$189 $178 $— $11 
Fair Value at December 31, 2022
TotalLevel 1Level 2Level 3
Assets:
Investments in equity securities330 319 — 11 
Total assets$330 $319 $— $11 
The following is a discussion of the valuation methodologies used for the Company’s assets measured at fair value.

Investments in equity securities are marked to market based on the respective publicly quoted market prices of the equity securities adjusted for liquidity. The fair value for Level 1 equity investments was determined using quoted prices of the security in active markets. The fair value for Level 3 equity investments was determined using a pricing model with certain significant unobservable market data inputs.

Investments in debt securities are valued using an option pricing model under the income approach methodology as the investment does not have observable inputs of identical or comparable instruments.

The Company noted that there was no change in Level 3 instruments for which significant unobservable inputs were used to determine fair value for the nine months ended September 30, 2023. The following table is a reconciliation of assets for Level 3 investments for which significant unobservable inputs were used to determine fair value for the nine months ended September 30, 2023:

Level 3
Level 3 Investments
Balance at January 1, 2023$11 
Unrealized loss on equity securities— 
Balance at September 30, 2023$11