Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Acquisition (Details Textual)

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Note 11 - Acquisition (Details Textual) - USD ($)
9 Months Ended
Feb. 20, 2018
Jun. 30, 2018
Jun. 30, 2017
Payments to Acquire Businesses, Gross   $ 10,350,000
Calix, Inc. [Member]      
Business Combination, Consideration Transferred, Total $ 10,350,000    
Payments to Acquire Businesses, Gross 10,350,000    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total 0    
Purchase Obligation, Total 3,500,000    
Goodwill, Acquired During Period 2,138,000    
Business Acquisition, Transaction Costs $ 106,000    
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 12 years 182 days