XML 58 R48.htm IDEA: XBRL DOCUMENT v3.24.0.1
Contingencies and Guaranty (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 45 Months Ended
Dec. 31, 2023
Nov. 30, 2023
Sep. 30, 2023
Jul. 31, 2023
Oct. 31, 2022
Sep. 30, 2022
Feb. 28, 2021
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2026
Mar. 31, 2023
Mar. 31, 2022
Commitments And Contingencies [Line Items]                              
Contingent liability $ 15,000           $ 20,000 $ 15,000     $ 15,000     $ 0  
Contingent liability 1,000             1,000     1,000     20,249  
Payments to acquire intangible assets                     14,809 $ 19,069      
Increase in deposit assets               7,500              
Prepayments received 107,060   $ 80,265     $ 53,945   107,060 $ 80,265 $ 61,367 107,060 61,367   $ 60,759 $ 54,678
Spectrum revenues               1,271   578 2,931 1,311      
SDG&E | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement                              
Commitments And Contingencies [Line Items]                              
Milestone payment received 200   25,200     $ 200   200 $ 25,200            
Delivery delay adjustments     $ 1,100                        
Xcel Energy | Spectrum revenue                              
Commitments And Contingencies [Line Items]                              
Spectrum revenues               663   0 1,107 0      
Xcel Energy | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement                              
Commitments And Contingencies [Line Items]                              
Milestone payment received   $ 21,200   $ 21,200                      
Agreement term         20 years                    
Prepayments received 50,300             50,300   $ 8,000 50,300 $ 8,000      
Xcel Energy | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum                              
Commitments And Contingencies [Line Items]                              
Prepayments received $ 49,200             $ 49,200     $ 49,200        
Lower Colorado River Authority (LCRA) | Forecast | Licensing Agreements                              
Commitments And Contingencies [Line Items]                              
Payments to acquire intangible assets                         $ 30,000    
SDG&E                              
Commitments And Contingencies [Line Items]                              
Consideration transferred             $ 50,000