Quarterly report pursuant to Section 13 or 15(d)

Customer Concentrations and Accounts Receivable ??? Accounts Receivable (Details)

v3.10.0.1
Customer Concentrations and Accounts Receivable – Accounts Receivable (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 05, 2018
USD ($)
payment
Oct. 13, 2017
USD ($)
payment
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2015
USD ($)
Distribution and Accounts Receivable Assignment Agreements                  
Net bad debt expense (recovery)     $ 100   $ (9,000) $ 55 $ (22)    
BPC                  
Distribution and Accounts Receivable Assignment Agreements                  
Accounts receivable     5,200 $ 5,200   5,200     $ 8,100
Total collections on accounts receivable allowance     1,800     1,800      
Accounts Receivable Assignment Agreement | Turbine International, LLC                  
Distribution and Accounts Receivable Assignment Agreements                  
Total consideration receivable   $ 2,500              
Number of payments to be received | payment   3              
Bad debt recovery     100         $ 1,000  
Total collections on accounts receivable allowance     $ 1,100     $ 1,100      
Promissory Note Agreement | Turbine International, LLC                  
Distribution and Accounts Receivable Assignment Agreements                  
Total consideration receivable   $ 3,800              
Number of payments to be received | payment   35              
Term of payments   3 years              
Amended Assignment Agreement | Turbine International, LLC                  
Distribution and Accounts Receivable Assignment Agreements                  
Total consideration receivable $ 1,500                
Number of payments to be received | payment 5                
Amended Note Agreement                  
Distribution and Accounts Receivable Assignment Agreements                  
Payments due       $ 0          
Amended Note Agreement | Turbine International, LLC                  
Distribution and Accounts Receivable Assignment Agreements                  
Total consideration receivable $ 3,800                
Number of payments to be received | payment 13                
Term of payments 3 years