Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable (Details)

v3.6.0.2
Customer Concentrations and Accounts Receivable (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Mar. 31, 2016
Customer Concentrations and Accounts Receivable          
Bad debt expense (recovery) $ 12,000 $ (200,000) $ (1,384,000) $ (176,000)  
Accounts receivable     1,747,000 (555,000)  
Deferred revenue     212,000 $ 907,000  
BPC Engineering          
Customer Concentrations and Accounts Receivable          
Accounts receivable     1,500,000    
Deferred revenue     8,100,000    
BPC And Electro Mecanique Industries [Member]          
Customer Concentrations and Accounts Receivable          
Bad debt expense (recovery)     $ (1,400,000)    
Sales | Customer concentrations | E-Finity          
Customer Concentrations and Accounts Receivable          
Concentration percentage   17.00%   11.00%  
Sales | Customer concentrations | Horizon Power Systems          
Customer Concentrations and Accounts Receivable          
Concentration percentage 16.00% 12.00% 10.00% 16.00%  
Sales | Customer concentrations | DTC          
Customer Concentrations and Accounts Receivable          
Concentration percentage   10.00%      
Sales | Customer concentrations | Optimal Group Australia          
Customer Concentrations and Accounts Receivable          
Concentration percentage       10.00%  
Sales | Customer concentrations | BPC Engineering          
Customer Concentrations and Accounts Receivable          
Concentration percentage 16.00%   12.00%    
Sales | Customer concentrations | Critchfield Pacific Incorporated          
Customer Concentrations and Accounts Receivable          
Concentration percentage   13.00%      
Net accounts receivable | Credit concentration | E-Finity          
Customer Concentrations and Accounts Receivable          
Concentration percentage     12.00%    
Net accounts receivable | Credit concentration | Horizon Power Systems          
Customer Concentrations and Accounts Receivable          
Concentration percentage     22.00%    
Net accounts receivable | Credit concentration | Reliable Secure Power Systems          
Customer Concentrations and Accounts Receivable          
Concentration percentage         10.00%
Net accounts receivable | Credit concentration | DTC          
Customer Concentrations and Accounts Receivable          
Concentration percentage     17.00%   28.00%
Net accounts receivable | Credit concentration | Optimal Group Australia          
Customer Concentrations and Accounts Receivable          
Concentration percentage         11.00%
Net accounts receivable | Credit concentration | Regale Energy Zrt          
Customer Concentrations and Accounts Receivable          
Concentration percentage         10.00%
Net accounts receivable | Credit concentration | MicroTurbine Power          
Customer Concentrations and Accounts Receivable          
Concentration percentage     10.00%