Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.8.0.1
Subsequent Events (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Jun. 05, 2018
USD ($)
payment
Apr. 13, 2018
$ / shares
shares
Oct. 13, 2017
USD ($)
payment
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2017
USD ($)
Oct. 26, 2017
$ / shares
Aug. 31, 2017
$ / shares
Oct. 18, 2016
$ / shares
Apr. 19, 2016
$ / shares
Mar. 31, 2015
USD ($)
Subsequent Event Items                      
Common stock sold (in shares) | shares       6,700,000 16,000,000            
Bad debt recovery         $ 1,099 $ 1,525          
Subsequent event                      
Subsequent Event Items                      
Common stock sold (in shares) | shares   3,806,243                  
BPC                      
Subsequent Event Items                      
Accounts receivable       $ 5,300 5,300           $ 8,100
BPC | Subsequent event                      
Subsequent Event Items                      
Number of payments to be received | payment 5                    
Accounts receivable $ 1,500                    
Turbine International, LLC. and MTE Service                      
Subsequent Event Items                      
Proceeds from sale of distribution rights     $ 6,300                
Turbine International, LLC. and MTE Service | Accounts Receivable Agreement                      
Subsequent Event Items                      
Total consideration receivable     $ 2,500                
Number of payments to be received | payment     3                
Bad debt recovery       $ 300 $ 1,000            
Turbine International, LLC. and MTE Service | Promissory Note Agreement                      
Subsequent Event Items                      
Total consideration receivable     $ 3,800                
Term of payments     3 years                
Number of payments to be received | payment     35                
Turbine International, LLC. and MTE Service | Amended Promissory Note Agreement | Subsequent event                      
Subsequent Event Items                      
Total consideration receivable $ 3,800                    
Term of payments 3 years                    
Number of payments to be received | payment 13                    
Series A Warrants                      
Subsequent Event Items                      
Exercise price (in dollars per share) | $ / shares             $ 0.90 $ 0.60 $ 1.34 $ 3.50  
Series A Warrants | Subsequent event                      
Subsequent Event Items                      
Warrants exercised (in shares) | shares   5,760,000                  
Exercise price (in dollars per share) | $ / shares   $ 0.60