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Fair Value Measurements - Summary of Fair Value Assets Measured on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair value information related to assets    
Assets $ 3,780 $ 3,459
Quoted Prices in Active Markets (Level 1)    
Fair value information related to assets    
Assets 3,780 3,459
Money market funds    
Fair value information related to assets    
Assets [1] 2 2
Money market funds | Quoted Prices in Active Markets (Level 1)    
Fair value information related to assets    
Assets [1] 2 2
Other mutual funds    
Fair value information related to assets    
Assets [2] 3,778 3,457
Other mutual funds | Quoted Prices in Active Markets (Level 1)    
Fair value information related to assets    
Assets [2] $ 3,778 $ 3,457
[1]

We include money market funds in “Cash and cash equivalents” in the Condensed Consolidated Balance Sheets. We classify these investments as available-for-sale and record them at fair value. There have been no realized gains or losses related to these investments and we have not experienced any redemption restrictions with respect to any of the money market mutual funds.
[2] We include other mutual funds in “Other investments and assets” in the Condensed Consolidated Balance Sheets.