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Revenue Recognition and Contracts with Customers (Details Textual) - USD ($)
3 Months Ended
Jul. 02, 2018
Sep. 30, 2018
Sep. 30, 2017
Jul. 01, 2018
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets       $ 720,000
New Accounting Pronouncement or Change in Accounting Principle Income Tax Expense Benefit $ 191,000      
New Accounting Pronouncement or Change in Accounting Principle Effect of Change In Other Assets 716,000      
New Accounting Pronouncement or Change in Accounting Principle Effect of Change on Receivables   $ 1,817,000    
New Accounting Pronouncement or Change in Accounting Principle Effect of Change on Refund Liabilities $ 1,627,000      
Sales Returns and Allowances [Member]        
Concentration Risk, Percentage     8.00%  
Sales Revenue, Product Line [Member]        
Concentration Risk, Percentage   9.00%