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LOANS PAYABLE (Details)
€ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2018
EUR (€)
Dec. 31, 2017
EUR (€)
Jan. 31, 2017
EUR (€)
Aug. 31, 2015
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2017
USD ($)
May 31, 2018
USD ($)
Apr. 30, 2018
GBP (£)
Nov. 30, 2015
EUR (€)
Debt Instrument [Line Items]                    
Related party interest expense         $ 0 $ 62,000 $ 806,000      
Loans Payable | 1.50% Loans Payable                    
Debt Instrument [Line Items]                    
Loans payable, face amount | €                   € 14.0
Stated interest rate                   1.50%
Portion of loan paid | € € 2.9 € 2.9 € 2.9              
Loans Payable | Non Interest Bearing Unsecured Convertible Loan [Member]                    
Debt Instrument [Line Items]                    
Loans payable, face amount | £                 £ 10,500,000.0  
Interest and unused commitment fees paid         325,000          
Loans Payable | Two Point Eighty Eight Percent Loans Payable [Member]                    
Debt Instrument [Line Items]                    
Loans payable, face amount               $ 2,800,000.0    
Stated interest rate               2.88%    
Loans Payable | ORIX USA Corporation | 1.65% Loans Payable                    
Debt Instrument [Line Items]                    
Loans payable, face amount       $ 45,000,000            
Related party interest expense         $ 0 $ 62,000 1,000      
Loans payable, required quarterly repayments       $ 7,500,000            
Loans Payable | ORIX USA Corporation | 1.65% Loans Payable | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       165.00% 4.36% 4.31%        
Loans Payable | Former Shareholders                    
Debt Instrument [Line Items]                    
Related party interest expense         $ 96,000 $ 124,000 203,000      
Stated interest rate         3.92% 3.10%        
Loans Payable | Joint Venture | 1.50% Loans Payable                    
Debt Instrument [Line Items]                    
Related party interest expense         $ 131,000 $ 179,000 213,000      
Revolving line of credit | Bank of America                    
Debt Instrument [Line Items]                    
Revolving line of credit, maximum borrowing capacity       $ 75,000,000            
Principal outstanding         0          
Interest and unused commitment fees paid         228,000 228,000 $ 400,000      
Revolving line of credit | Bank of America | LIBOR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.00%            
Italy | Leonardo                    
Debt Instrument [Line Items]                    
Interest acquired in the investment banking operations of Leonardo in Italy (as a percent)                   49.00%
Other Liabilities | January 2015 Acquisition                    
Debt Instrument [Line Items]                    
Business combination, noncontingent consideration liability         226,000 226,000        
Other Liabilities | January 2017 Acquisition                    
Debt Instrument [Line Items]                    
Business combination, noncontingent consideration liability         $ 1,983,000 $ 1,918,000