Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares		12 Months Ended
	Dec. 16, 2021	Dec. 31, 2021	Dec. 31, 2020
December 2021 Private Placement
Impairment Effects on Earnings Per Share [Line Items]
Number of warrants issued (in shares)		1,363,641
Pre-Funded Warrants | December 2021 Private Placement
Impairment Effects on Earnings Per Share [Line Items]
Number of warrants issued (in shares)	85,228	85,228
Equity Option
Impairment Effects on Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (number of shares)		51,000	69,000
Restricted Stock Units (RSUs)
Impairment Effects on Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (number of shares)			4,000
Common Warrants
Impairment Effects on Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (number of shares)		47,000	174,000
Convertible Preferred Stock
Impairment Effects on Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (number of shares)		260,000	506,000