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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CASH AND CASH EQUIVALENTS (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Accounting Policies [Abstract]        
Cash and cash equivalents $ 14,474 $ 17,872    
Restricted Cash 1,000 1,000    
Total $ 15,474 $ 18,872 $ 18,141 $ 18,952