Capital Stock - Additional Information (Details) - USD ($)						12 Months Ended
	Jun. 30, 2021	Jan. 21, 2021	Dec. 10, 2020	Dec. 06, 2020	Oct. 21, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Issuance of shares for professional service fees						$ 390,000	$ 58,000
Payments of stock issuance costs	$ 896,000
Proceeds from issuance of common stock, net of offering costs	$ 11,504,000					$ 11,504,000	$ 7,371,000
Issuance of common shares from warrant exercise (in shares)					521,500
Warrant term					2 years
Exercise price (in dollars per share)						$ 4.85	$ 4.85	$ 0.01
Class of warrant or right, exercise of warrants (in shares)						0
Warrant modification						$ 37,000	$ 0
Stock repurchased (in shares)						0	7,998
Tax obligations relating to the vesting of shares						$ 0	$ 16,000
Stock awards
Class of Stock [Line Items]
Tax obligations relating to the vesting of shares							16,000
General and Administrative Expense
Class of Stock [Line Items]
Stock option compensation expense						$ 390,000	$ 58,000
Common Stock
Class of Stock [Line Items]
Conversion of convertible preferred stock, shares (in shares)						18,846,411	158,333
Issuances related to stock compensation (in shares)						200,000	30,834
Issuance of shares for fees (in shares)		21,008	50,000			21,000	50,000
Issuance of shares for professional service fees		$ 100,000	$ 348,000
Issuance of common shares from warrant exercise (in shares)							72,000
Common Stock | Public Offering
Class of Stock [Line Items]
Number of shares sold in transaction (in shares)	4,000,000
Sale of stock, price per share (in dollars per share)						$ 4.00
Common Stock | Private Placement
Class of Stock [Line Items]
Sale of stock, price per share (in dollars per share)						$ 4.40
Deducting issuance cost	$ 12,400,000
Warrants
Class of Stock [Line Items]
Issuance of common shares from warrant exercise (in shares)				625,000
Warrant term				2 years
Exercise price (in dollars per share)				$ 5.49	$ 4.08
Warrant modification						$ 37,000
Warrants | Public Offering
Class of Stock [Line Items]
Number of shares sold in transaction (in shares)	1,000,000
Warrants | Private Placement
Class of Stock [Line Items]
Number of shares sold in transaction (in shares)	3,000,000
Series B Warrants
Class of Stock [Line Items]
Warrant term						3 years
Series A Warrants
Class of Stock [Line Items]
Warrant term						6 months