Stockholders' Deficit and Warrants (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Summary of Activity for Warrants Outstanding

The following table summarizes such warrants outstanding and exercisable as of June 30, 2021 and December 31, 2020 that are liability-classified.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
June 30, 2021
Outstanding		16,022,000	$	0.52		5.3
Exercisable		16,022,000	$	0.52
December 31, 2020
Outstanding		16,022,000	$	0.52		5.8
Exercisable		16,022,000	$	0.52

In addition to the issuance of the aforementioned liability-classified warrants, the Company has issued warrants with different terms that are considered indexed to the Company's common stock and, therefore, are classified in additional paid-in capital and are not required to be measured at fair value at each reporting date. The following table summarizes such equity-classified warrants outstanding and exercisable as of June 30, 2021 and December 31, 2020.

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term
June 30, 2021
Outstanding		11,087,708	$	2.44		7.4
Exercisable		11,087,708	$	2.44
December 31, 2020
Outstanding		8,856,255	$	2.91		7.4
Exercisable		8,522,922	$	2.91