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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Mar. 31, 2018
Carrying Value [Member]    
Liabilities:    
Note payable $ 308 $ 294
Bank debt   3,500
Senior secured convertible debentures, net 9,739  
Bifurcated embedded derivative on senior secured convertible debentures, net 30  
Unsecured convertible notes payable, net 4,546 4,916
Level 1 [Member]    
Liabilities:    
Note payable
Bank debt  
Senior secured convertible debentures, net  
Bifurcated embedded derivative on senior secured convertible debentures, net  
Unsecured convertible notes payable, net
Level 2 [Member]    
Liabilities:    
Note payable
Bank debt   3,500
Senior secured convertible debentures, net  
Bifurcated embedded derivative on senior secured convertible debentures, net  
Unsecured convertible notes payable, net
Level 3 [Member]    
Liabilities:    
Note payable 308 294
Bank debt  
Senior secured convertible debentures, net 11,266  
Bifurcated embedded derivative on senior secured convertible debentures, net 200  
Unsecured convertible notes payable, net $ 8,549 $ 4,916