Note 3 - Short-term Investments

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

3. Short-term Investments

The Company classifies its short-term investments as available-for-sale securities. Available-for-sale securities are carried at fair market value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss in stockholders’ equity. No gains or losses were realized during the three and six months ended March 31, 2023 from the sale of short-term investments. For the three and six months ended March 31, 2022, the Company realized losses of $11,000 and $18,000 from the sale of short-term investments.

The Company’s short-term investments were composed of the following (in thousands):

	September 30, 2022 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate bonds	$	909	$	—	$	(15	)	$	894

The Company had no short-term investments at March 31, 2023.