10. WARRANTS

The following table presents information about warrants to purchase Common Stock issued and outstanding at March 31, 2019:


		Number of	Exercise
Year Issued	Classification	Warrants	Price		Date of Expiration
2012	Equity	243	$	166.00	10/5/2019
2014	Equity	307	$	11.75	5/9/2021
2016	Equity	85,869	$	250.00	3/18/2021
2018	Equity	7,586,711	$	2.00	6/25/2023
Total		7,673,130
Weighted average exercise price			$	4.78
Weighted average life in years					4.21

In May 2014, the Company issued warrants in a public offering (the “2014 Warrants”). At inception, the 2014 and 2018 Warrants had provisions that precluded equity classification. Upon amendment, the Company assessed whether the warrants required accounting as derivatives and determined that the warrants were (1) indexed to the Company’s own stock and (2) classified in stockholders’ equity in accordance with FASB Accounting Standards Codification Topic 815, Derivatives and Hedging. As such, the Company concluded that the warrants meet the scope exception for determining whether the instruments require accounting as derivatives and accordingly are classified in stockholders’ equity. See below for a further description of the warrant amendments.

Warrant Cancellation

During the year ended December 31, 2018, the Company entered into warrant cancellation agreements with certain holders of the 2014 Warrants to cancel and terminate such warrants for total cash consideration of $14 thousand. As of March 31, 2019, the sole remaining 2014 Warrant was exercisable for an aggregate of 307 shares of Common Stock.

Warrant Amendment

In May 2018, the Company entered into a warrant amendment agreement with the sole remaining holder of a 2014 Warrant (the “Warrant Amendment”). The warrant holder received cash compensation of $19 thousand and a 2 year extension of warrant term in exchange for the removal of all anti-dilution provisions except those for stock splits, reverse splits or stock dividends. As a result of the Warrant Amendment, the Company reclassified the remaining 2014 Warrant valued at $1 thousand to stockholders’ equity (see Note 11).

In September 2018, the Company entered into the Ladenburg Warrant Amendment. As a result of the Ladenburg Warrant Amendment, the Company reclassified the 2018 Warrants valued at $14.7 million to stockholders’ equity (see Note 11).