Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable (Details)

v3.22.2.2
Customer Concentrations and Accounts Receivable (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
Distributor
Sep. 30, 2021
USD ($)
Distributor
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2022
Risk Concentrations          
Bad debt expense | $     $ 75    
RSP Systems, Capstone Engineered Solutions, Cal Microturbine, and Horizon Power Systems          
Risk Concentrations          
Number of distributors 4        
E-Finity          
Risk Concentrations          
Number of distributors   1      
Optimal Group Australia Pty Ltd          
Risk Concentrations          
Number of distributors   1      
Revenue from Contract with Customer Benchmark | Customer concentrations          
Risk Concentrations          
Bad debt expense | $ $ 100 $ 0 $ 100 $ 0  
Revenue from Contract with Customer Benchmark | Customer concentrations | RSP Systems          
Risk Concentrations          
Concentration percentage (as a percent) 15.00%        
Revenue from Contract with Customer Benchmark | Customer concentrations | Capstone Engineered Solutions          
Risk Concentrations          
Concentration percentage (as a percent) 13.00%        
Revenue from Contract with Customer Benchmark | Customer concentrations | Cal Microturbine          
Risk Concentrations          
Concentration percentage (as a percent) 12.00%   18.00%    
Revenue from Contract with Customer Benchmark | Customer concentrations | Horizon          
Risk Concentrations          
Concentration percentage (as a percent) 10.00%        
Revenue from Contract with Customer Benchmark | Customer concentrations | E-Finity          
Risk Concentrations          
Concentration percentage (as a percent)   23.00%   17.00%  
Revenue from Contract with Customer Benchmark | Customer concentrations | Optimal Group Australia Pty Ltd          
Risk Concentrations          
Concentration percentage (as a percent)   11.00%   10.00%  
Net accounts receivable | Credit concentration | E-Finity          
Risk Concentrations          
Concentration percentage (as a percent)     11.00%   28.00%