v3.26.1
Note 5 - Revenues (Details Textual)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 03, 2014
Number of Suspended Saltwater Injection Wells 2       2
Revenue from Contract with Customer, Excluding Assessed Tax $ 17,658 $ 16,068      
Accounts Receivable, Allowance for Credit Loss 300   $ 200    
Contract with Customer, Asset, after Allowance for Credit Loss 707 $ 733 541 $ 582  
Contract with Customer, Liability $ 5,100   3,500    
Customer Concentration Risk [Member] | Revenue Benchmark [Member]          
Number of Major Customers 1 1      
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]          
Concentration Risk, Percentage 11.00% 10.00%      
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]          
Concentration Risk, Percentage 28.00% 13.00%      
Waste Management Services [Member]          
Accounts Receivable, after Allowance for Credit Loss $ 8,900   8,800    
Waste Management Services [Member] | Maximum [Member]          
Contract Term (Year) 1 year        
Waste Management Services [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]          
Concentration Risk, Percentage 65.00% 60.00%      
Number of Major Customers 1 1      
Waste Management Services [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]          
Concentration Risk, Percentage 17.00% 16.00%      
Waste Management Services [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Number of Major Customers 1 1      
Waste Management Services [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member]          
Concentration Risk, Percentage 36.00% 18.00%      
Golf and Related Operations [Member]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 6,150 $ 6,391      
Number of Golf Courses 4        
Membership Agreement, Term 1 year        
Accounts Receivable, after Allowance for Credit Loss $ 2,900   $ 1,000    
Golf and Related Operations [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member]          
Concentration Risk, Percentage 35.00% 40.00%      
Golf and Related Operations [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member]          
Number of Major Customers 0   0    
Salt Water Injection Wells [Member] | Waste Management Services [Member]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 0 $ 0      
Customer Advance Deposits [Member]          
Contract with Customer, Liability $ 1,746 $ 1,647 $ 1,688 $ 1,565