XML 69 R54.htm IDEA: XBRL DOCUMENT v3.20.2
Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - Estimate of Fair Value Measurement [Member] - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Sep. 30, 2020
Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis $ 114,147 $ 72,873
Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 43,322 37,794
Notes receivable    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 32,793 35,079
Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 33,119  
Municipal bonds, and other    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 4,913  
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 81,354 37,794
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 43,322 37,794
Quoted Prices in Active Markets for Identical Assets (Level 1) | Notes receivable    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 33,119  
Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal bonds, and other    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 4,913  
Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2) | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2) | Notes receivable    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0 0
Significant Other Observable Inputs (Level 2) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0  
Significant Other Observable Inputs (Level 2) | Municipal bonds, and other    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0  
Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 32,793 35,079
Significant Unobservable Inputs (Level 3) | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0 0
Significant Unobservable Inputs (Level 3) | Notes receivable    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 32,793 $ 35,079
Significant Unobservable Inputs (Level 3) | Corporate bonds    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis 0  
Significant Unobservable Inputs (Level 3) | Municipal bonds, and other    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Total assets at fair value on a recurring basis $ 0