Description of Business and Summary of Significant Accounting Policies - Schedule of Computation of Diluted Net Loss per Share of Common Stock Attributable to Common Stockholders (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock	32,864,504	43,117,529	32,864,504	43,117,529
Stock Option [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock	10,420,249	9,354,250	10,420,249	9,354,250
Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock	12,606,255	20,031,255	12,606,255	20,031,255
Secured Convertible Promissory Notes [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock		1,712,690		1,712,690
Redeemable Series A Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock		129,622		129,622
Redeemable Series B Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock		2,156,712		2,156,712
Four Convertible Promissory Notes [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock	7,490,000	7,385,000	7,490,000	7,385,000
Purchase of Fixed Assets [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Amount of potentially dilutive shares excluded from computation of diluted net loss per share of common stock	2,348,000	2,348,000	2,348,000	2,348,000