Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies and Going Concern - Risk Concentrations (Details)

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Summary of Significant Accounting Policies and Going Concern - Risk Concentrations (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Risk Concentrations    
Aggregate balances that exceed insurance coverage $ 22.0  
Revenue from Contract with Customer Benchmark | Customer concentrations | Cal Microturbine    
Risk Concentrations    
Concentration percentage (as a percent)   19.00%
Revenue from Contract with Customer Benchmark | Customer concentrations | E-Finity    
Risk Concentrations    
Concentration percentage (as a percent) 18.00% 12.00%
Net accounts receivable | Credit concentration | Cal Microturbine    
Risk Concentrations    
Concentration percentage (as a percent)   15.00%
Net accounts receivable | Credit concentration | E-Finity    
Risk Concentrations    
Concentration percentage (as a percent) 28.00%  
Net accounts receivable | Credit concentration | Radian    
Risk Concentrations    
Concentration percentage (as a percent) 14.00%  
Net accounts receivable | Credit concentration | Supernova    
Risk Concentrations    
Concentration percentage (as a percent)   11.00%
Net accounts receivable | Credit concentration | D T C Soluciones    
Risk Concentrations    
Concentration percentage (as a percent)   11.00%