WARRANTS (Tables)

3 Months Ended

Mar. 31, 2020

Other Liabilities Disclosure [Abstract]

Summary of Warrants

	Number of Underlying Shares (1)		Weighted Average Exercise Price at March 31, 2020	Remaining Contractual Life at March 31, 2020 (No. Years)
	March 31, 2020	December 31, 2019
Liability-classified warrants
Issued April 2017	11,718	11,718	$8.53	5.08
Equity-classified warrants
Issued February 2020 (2)	7,500,000	—	$1.10	4.86
Issued November 2017	24,097	24,097	$7.15	4.63
Acquired February 2017	—	10,707	$—	—
Subtotal	7,524,097	34,804	$1.12
Total warrants	7,535,815	46,522	$1.13

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(1) If the Company subdivides (by any stock split, stock dividend, recapitalization or otherwise) its outstanding shares of its common stock into a smaller number of shares, the warrant exercise price is proportionately reduced and the number of shares under outstanding warrants is proportionately increased. Additionally, if the Company combines (by combination, reverse stock split or otherwise) its outstanding shares of common stock into a smaller number of shares, the warrant exercise price is proportionately increased and the number of shares under outstanding warrants is proportionately decreased.

(2) Subject to specified conditions, the Company may voluntarily reduce the warrant exercise price of the warrants issued in February 2020.

A summary of the Company’s warrant activity during the three months endedMarch 31, 2020 is as follows:

	Common Stock Warrants
	Number		Weighted Average Exercise Price
Outstanding at December 31, 2019	46,522		$	17.93
Granted	7,500,000		$	1.10
Expired	(10,707	)	$	52.50
Outstanding at March 31, 2020	7,535,815		$	1.13