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. For the three and nine months ended June 30, 2022, the Company realized losses of $4,000 and $22,000, respectively, from the

sale of short-term investments. For each of the three and nine months ended June 30, 2021, the Company realized losses of $1,000 from the sale of short-term investments.

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


	As of June 30, 2022 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate bonds	$	1,615	$	—	$	(17	)	$	1,598


	As of September 30, 2021 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate bonds	$	9,511	$	—	$	(15	)	$	9,496

The Company’s short-term investments at June 30, 2022 had contractual maturities ranging from July 2022 to March 2023.

During the three and nine months ended June 30, 2021, the Company recognized a gain of $1.7 million and $2.0 million, respectively, in connection with the sale of its interest in a senior secured bond originally issued from an international seismic marine customer.