Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable (Details)

v3.21.2
Customer Concentrations and Accounts Receivable (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Distributor
Sep. 30, 2020
USD ($)
Distributor
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Mar. 31, 2021
Risk Concentrations          
Number of distributors       1  
Recovery of bad debt | $       $ 48  
Optimal Group Australia Pty Ltd          
Risk Concentrations          
Number of distributors 1        
E-Quad          
Risk Concentrations          
Number of distributors   1      
E-Finity          
Risk Concentrations          
Number of distributors 1        
Revenue from Contract with Customer Benchmark | Customer concentrations | Cal Microturbine          
Risk Concentrations          
Concentration percentage (as a percent)       10.00%  
Revenue from Contract with Customer Benchmark | Customer concentrations | Optimal Group Australia Pty Ltd          
Risk Concentrations          
Concentration percentage (as a percent) 11.00%   10.00%    
Revenue from Contract with Customer Benchmark | Customer concentrations | E-Quad          
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% 10.00%  
Revenue from Contract with Customer Benchmark | Credit concentration          
Risk Concentrations          
Recovery of bad debt | $ $ 0 $ 100 $ 0 $ 100  
Net accounts receivable | Credit concentration | E-Finity          
Risk Concentrations          
Concentration percentage (as a percent)     20.00%   13.00%