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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2022

Class Of Stock [Line Items]

Schedule of Stock-Based Compensation Expense Recognized

Total stock-based compensation expense was recognized in our condensed consolidated statements of operations and comprehensive loss as follows (in thousands):

		For the Three Months Ended March 31,
		2022				2021
Research and development		$	880			$	685
General and administrative			1,306				1,089
Total stock-based compensation		$	2,186			$	1,774

Common Stock Warrants [Member]

Class Of Stock [Line Items]

Schedule of Warrant Activity

		Roll Forward of Warrant Activity
		Registered direct warrants, placement agent				Private placement warrants				Private placement warrants, placement agent				Warrants exchanged for common stock				Warrants exchanged for Series X¹ preferred stock				Total
Balance as of December 31, 2021			9,581				319,064				9,177				509,117				298,692				1,145,631
Issued			—				—				—				—				—				—
Exercised			—				—				—				—				—				—
Cancelled/Expired			—				—				—				—				—				—
Balance as of March 31, 2022			9,581				319,064				9,177				509,117				298,692				1,145,631

Preferred Stock Warrants [Member]

Class Of Stock [Line Items]

Schedule of Warrant Activity

		Roll Forward of Series X¹ Convertible Preferred Warrant Activity
		Total
Balance as of December 31, 2021			50,207.419
Assumed and replaced			—
Exercised			—
Cancelled/Expired			—
Balance as of March 31, 2022			50,207.419