Fair Value Measurements
Items Measured at Fair Value on a recurring basis
Money Market Funds—We hold cash in a U.S. treasury securities money market fund with JPMorgan Chase Bank, N.A. The funds are classified as cash and cash equivalents on our consolidated balance sheets as of December 31, 2024 and 2023 and represent Level 1 assets on the fair value hierarchy.
For assets measured at fair value, the following tables summarize the respective fair values and classifications by level of input within the fair value hierarchy as of December 31, 2024 and 2023. We had no liabilities measured at fair value as of December 31, 2024 and 2023:
December 31, 2024
(in thousands)Level 1Level 2Level 3Total
Assets
Money market funds$37,000 $— $— $37,000 
NFW investment
— — 200 200 
$37,000 $— $200 $37,200 
December 31, 2023
(in thousands)Level 1Level 2Level 3Total
Assets
Money market funds$82,000 $— $— $82,000 
$82,000 $— $— $82,000 
Items Measured at Fair Value on a non-recurring basis
Equity Investments—Our equity investments in NFW and Noho ESG represent non-marketable equity securities in privately held companies that do not have a readily determinable fair value and are accounted for under the measurement alternative in ASC 321. In the fourth quarter of 2024, based on a qualitative assessment of impairment indicators, we
determined that the fair value of our equity investment in NFW was below its carrying value. The fair value was considered to be a level 3 asset based on unobservable inputs that reflect our own assumptions. As a result, we recorded an impairment charge of $1.8 million for the year ended December 31, 2024.
We recognized a $0.1 million loss for our investment in Noho ESG during the year ended December 31, 2023.
The carrying values of our investments were $0.2 million and $2.0 million as of December 31, 2024 and 2023, respectively.

About Fair Value Disclosures

Fair value disclosures classify all assets and liabilities measured at fair value into a three-level hierarchy: Level 1 (quoted market prices), Level 2 (observable inputs like yield curves), and Level 3 (unobservable inputs requiring management estimates). The proportion of Level 3 assets directly reflects how much of the balance sheet depends on internal models rather than market evidence.

Key signals: a growing Level 3 balance relative to total fair-value assets increases valuation uncertainty and earnings volatility risk. Watch for transfers between levels — assets moving from Level 2 to Level 3 often signal deteriorating market liquidity. Unrealized gains and losses on Level 3 positions flow through earnings or other comprehensive income, so large swings deserve scrutiny. For financial institutions, examine the sensitivity disclosures that show how Level 3 valuations change under alternative assumptions. Compare the fair value of debt against its carrying amount to gauge hidden leverage.