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Note 2. Acquisitions (Details) - USD ($)
$ in Thousands
 3 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Jul. 18, 2016
Business Acquisition [Line Items]      
Business Combination, Bargain Purchase, Gain Recognized, Amount $ 925 $ 0  
Aircom      
Business Acquisition [Line Items]      
Business Acquisition, Date of Acquisition Agreement Jul. 18, 2016    
Business Combination, Consideration Transferred $ 3,500    
Payments to Acquire Businesses, Gross 2,500    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets     $ 6,400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities     $ 1,400
Business Combination, Bargain Purchase, Gain Recognized, Amount 925    
Nontrade Receivable, Current | Aircom      
Business Acquisition [Line Items]      
Business Combination, Consideration Transferred, Other 1,000    
Deferred Tax Liability | Aircom      
Business Acquisition [Line Items]      
Business Combination, Consideration Transferred, Liabilities Incurred $ 600