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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Investments       $ 15,951,000  
Percentage of ERP assets placed into service 20.00%        
ERP impairment $ 2,605,000 $ 18,668,000 $ 21,273,000 0 $ 0
Customer deposits $ 1,100,000   1,100,000 2,200,000  
Advertising expenditures     4,300,000 5,100,000 7,300,000
Design, research and development costs     4,400,000 $ 3,900,000 $ 3,700,000
Health care claims threshold for third party insurance     175,000    
Workers' compensation threshold for third party insurance     $ 450,000    
Maximum [Member]          
Remaining operating lease terms 5 years   5 years    
Computer Software [Member]          
Useful life of assets place into service     36 months    
Consulting And Internal Salary Implementation Costs [Member]          
Useful life of assets place into service     60 months    
Accounting Standards Update 2016-02 [Member] | Minimum [Member]          
Expected impact of ASU     $ 12,600,000    
Accounting Standards Update 2016-02 [Member] | Maximum [Member]          
Expected impact of ASU     $ 13,400,000