Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable (Details)

v3.7.0.1
Customer Concentrations and Accounts Receivable (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Customer Concentrations and Accounts Receivable      
Provision for doubtful accounts receivable $ (13) $ (904)  
Accounts receivable 4,786 (1,254)  
Deferred revenue 827 $ 1,863  
BPC Engineering      
Customer Concentrations and Accounts Receivable      
Accounts receivable 1,700    
Deferred revenue $ 8,100    
Sales | Customer concentrations | Regatta      
Customer Concentrations and Accounts Receivable      
Concentration percentage   17.00%  
Sales | Customer concentrations | E-Finity      
Customer Concentrations and Accounts Receivable      
Concentration percentage 15.00% 10.00%  
Sales | Customer concentrations | Horizon Power Systems      
Customer Concentrations and Accounts Receivable      
Concentration percentage 21.00%    
Net accounts receivable | Credit concentration | E-Finity      
Customer Concentrations and Accounts Receivable      
Concentration percentage 26.00%   29.00%
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 10.00%   12.00%
Net accounts receivable | Credit concentration | Optimal Group Australia      
Customer Concentrations and Accounts Receivable      
Concentration percentage 13.00%