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Debt - Additional Information (Details)
3 Months Ended 12 Months Ended
Apr. 30, 2020
Mar. 03, 2017
USD ($)
Jun. 24, 2016
USD ($)
debt_instrument
Jun. 30, 2017
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
Dec. 31, 2018
USD ($)
Apr. 20, 2018
USD ($)
May 31, 2017
debt_instrument
Debt Instrument [Line Items]                  
Long-term debt, fair value         $ 121,075,000   $ 107,860,000    
Eagletail Water Company                  
Debt Instrument [Line Items]                  
Number of debt instruments | debt_instrument                 2
2017 WIFA Loan [Member]                  
Debt Instrument [Line Items]                  
Debt Instrument, Decrease, Forgiveness   $ 157,000              
2016 Senior Secured Notes                  
Debt Instrument [Line Items]                  
Number of debt instruments | debt_instrument     2            
Debt instrument, face amount     $ 115,000,000.0            
Debt instrument, interest rate     4.55%            
Redemption percentage of principal amount     103.00%            
Cash paid for prepayment penalty       $ 3,200,000          
Write off of capitalized loan fees       $ 2,200,000          
Debt Issuance Costs, Net         605,000   649,000    
Future Debt service coverage ratio for June 30, 2021 through the quarter ending March 31, 2024     120.00%            
2016 Senior Secured Notes | Series A Senior Secured Notes                  
Debt Instrument [Line Items]                  
Debt instrument, face amount     $ 28,800,000            
Debt instrument, interest rate     4.38%            
Debt instrument, term     12 years            
Debt instrument, maturity date     Jun. 15, 2028            
2016 Senior Secured Notes | Series B Senior Secured Notes                  
Debt Instrument [Line Items]                  
Debt instrument, face amount     $ 86,300,000            
Debt instrument, interest rate     4.58%            
Debt instrument, term     20 years            
Debt Instrument, principal payments     $ 1,900,000            
Revolving Credit Facility [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate               2.25%  
Debt Issuance Costs, Line of Credit Arrangements, Net         $ 49,000   $ 137,000    
Line of Credit Facility, Maximum Borrowing Capacity               $ 8,000,000.0  
Debt instrument, maturity date Apr. 30, 2020                
Debt service coverage ratio     110.00%            
Debt service coverage ratio limiting dividend payment     125.00%            
Bonds and notes payable | 1.20% WIFA Loan, maturing October 2032                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate         1.20% 1.20%      
Debt instrument, term         20 years        
Bonds and notes payable | 4.65% Harquahala Loan, maturing January 2021                  
Debt Instrument [Line Items]                  
Debt instrument, interest rate         4.65% 4.65%      
Debt instrument, term         15 years        
Bonds and notes payable | 2017 WIFA Loan [Member]                  
Debt Instrument [Line Items]                  
Debt instrument, face amount   $ 175,000              
Debt instrument, interest rate   4.60%     4.60%        
Debt instrument, term         20 years