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LETTERS OF CREDIT (Details) - USD ($)
Mar. 31, 2016
Mar. 31, 2015
Credit facilities    
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit $ 437,000 $ 208,000
Standby letters of credit    
Credit facilities    
Outstanding Amount 13,516,000  
Restricted cash balance 7,246,000  
Long-term restricted cash, as determined by the expiration date of the underlying letters of credit $ 437,000  
Standby letters of credit | Minimum    
Credit facilities    
Percentage of outstanding amount that is cash secured 52.00%  
Standby letters of credit | Maximum    
Credit facilities    
Percentage of outstanding amount that is cash secured 63.00%