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12. WARRANTS

6 Months Ended

Mar. 31, 2020

Transactions involving our equity-classified warrants are summarized as follows:

	Number of shares		Weighted-average exercise price		Weighted- average remaining contractual term (in years)		Aggregate intrinsic value (in thousands)
Outstanding at September 30, 2019		423,605	$	6.64
Issued		527,923		1.49
Exercised		-		-
Forfeited		-		-
Outstanding at March 31, 2020		951,528	$	3.78		3.77	$	—

Exercisable at March 31, 2020		423,605	$	6.64		2.53	$	—

The following table summarizes outstanding common stock purchase warrants as of March 31, 2020:

	Number of shares		Weighted-average exercise price		Expiration

Exercisable at $7.80 per share		141,676	$	7.80	September 2021
Exercisable at $4.00 per share		70,500	$	4.00	September 2022
Exercisable at $7.50 per share		100,000	$	7.50	October 2022
Exercisable at $4.375 per share		51,429	$	4.375	September 2023
Exercisable at $7.50 per share		60,000	$	7.50	May 2024
Exercisable at $3.9125 per share		47,000	$	3.9125	October 2024
Exercisable at $1.25 per share		480,000	$	1.25	January 2025
		951,528		3.78