Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable (Details)

v3.21.2
Customer Concentrations and Accounts Receivable (Details) - Distributor
3 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2021
Risk Concentrations      
Number of distributors 2 2  
Revenue from Contract with Customer Benchmark | Customer concentrations | Horizon      
Risk Concentrations      
Concentration percentage (as a percent) 11.00%    
Revenue from Contract with Customer Benchmark | Customer concentrations | Cal Microturbine      
Risk Concentrations      
Concentration percentage (as a percent)   12.00%  
Revenue from Contract with Customer Benchmark | Customer concentrations | E-Finity      
Risk Concentrations      
Concentration percentage (as a percent) 10.00% 12.00%  
Accounts Receivable | Credit concentration | E-Finity      
Risk Concentrations      
Concentration percentage (as a percent) 13.00%   13.00%