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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Income Taxes [Line Items]      
Undistributed earnings of foreign subsidiaries $ 17,200,000    
Tax credit carry-forwards 5,451,000 $ 5,006,000 $ 4,928,000
Unrecognized tax benefits that would impact effective tax rate 251,000 1,315,000,000,000  
Internal Revenue Service (IRS) [Member]      
Income Taxes [Line Items]      
Operating loss carryfoward related to exercise of employee stock options 8,300,000    
Increase (decrease) in valuation allowance 16,349,000 $ 0 $ 121,000
Internal Revenue Service (IRS) [Member] | Tax Years 2022 Through 2036 [Member]      
Income Taxes [Line Items]      
Operating loss carryforward 30,000,000    
Internal Revenue Service (IRS) [Member] | Tax Years 2018 Through 2036 [Member]      
Income Taxes [Line Items]      
Tax credit carry-forwards $ 5,200,000    
Minimum [Member] | Internal Revenue Service (IRS) [Member]      
Income Taxes [Line Items]      
Open tax year 2013    
Minimum [Member] | Internal Revenue Service (IRS) [Member] | Tax Years 2022 Through 2036 [Member]      
Income Taxes [Line Items]      
Operating loss carryforward, expiration date Jan. 01, 2022    
Minimum [Member] | Internal Revenue Service (IRS) [Member] | Tax Years 2018 Through 2036 [Member]      
Income Taxes [Line Items]      
Tax credit carryforward, expiration date 2018    
Minimum [Member] | German Tax Authority [Member]      
Income Taxes [Line Items]      
Open tax year 2012    
Maximum [Member] | Internal Revenue Service (IRS) [Member]      
Income Taxes [Line Items]      
Open tax year 2016    
Maximum [Member] | Internal Revenue Service (IRS) [Member] | Tax Years 2022 Through 2036 [Member]      
Income Taxes [Line Items]      
Operating loss carryforward, expiration date Dec. 31, 2036    
Maximum [Member] | Internal Revenue Service (IRS) [Member] | Tax Years 2018 Through 2036 [Member]      
Income Taxes [Line Items]      
Tax credit carryforward, expiration date 2036    
Maximum [Member] | German Tax Authority [Member]      
Income Taxes [Line Items]      
Open tax year 2016