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Investments
3 Months Ended
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
3.
Investments
 
Short-term investments consisted of U.S. Treasury Bills at December 31, 2018 and September 30, 2018.
 
U.S. Treasury Bills are carried at amortized cost which approximates fair value and are classified as held-to-maturity investments.