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WARRANTS

3 Months Ended

Mar. 31, 2024

WARRANTS.

WARRANTS

8. WARRANTS

The following table summarizes the common stock warrants outstanding as of March 31, 2024 and December 31, 2023, each exercisable into the number of shares of common stock set forth below as of the specified dates:

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​	​	​	​	​	​	​	​	​	Shares Exercisable at
​	​	Exercise			Expiration		Exercisable		March 31,		December 31,
Issued		Price Per Share		​	Date	​	From	​	2024	​	2023
2014	​	$	375.00		November 2024		July 2017	​	320	​	320
2016	​	$	413.50		October 2026		September 2017	​	290	​	290
2018	​	$	609.23	​	October 2025	​	October 2018	​	3,693	​	3,693
​	​	​	​	​	​	​	​	​	4,303	​	4,303

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