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Acquisitions (Narratives) (Details) - USD ($)
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Business Acquisition [Line Items]    
Gain (Loss) on Disposition of Business $ 0 $ (169,000)
UNITED STATES    
Business Acquisition [Line Items]    
Business Exit Costs   $ 506,000
Other Restructuring Costs 1,113,000  
Subsequent Event [Member] | Office Building [Member] | Portion at Other than Fair Value Measurement [Member]    
Business Acquisition [Line Items]    
Proceeds from Sale of Buildings 2,396,000  
Subsequent Event [Member] | Office Building [Member] | Estimate of Fair Value Measurement [Member]    
Business Acquisition [Line Items]    
Proceeds from Sale of Buildings 6,363,000  
Cost of Sales [Member] | FRANCE    
Business Acquisition [Line Items]    
Business Exit Costs 815,000  
Selling and Marketing Expense [Member] | FRANCE    
Business Acquisition [Line Items]    
Business Exit Costs 94,000  
General and Administrative Expense [Member] | FRANCE    
Business Acquisition [Line Items]    
Business Exit Costs $ 233,000