|12 Months Ended|
Sep. 30, 2018
|Investments, Debt and Equity Securities [Abstract]|
|Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]||
Short-term investments consisted of the following:
U.S. Treasury Bills are carried at amortized cost which approximates fair value and are classified as held-to-maturity investments.
The entire disclosure for investments in certain debt and equity securities.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef