Summary of Significant Accounting Policies - Equity at the Market Offering (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Less other offering costs	$ (22)	$ (61)	$ (31)
Net proceeds from sale of common shares	549	1,724	2,830
Common Stock
Class of Stock [Line Items]
Net proceeds from sale of common shares	1	5	9
At the Market Offerings | Common Stock
Class of Stock [Line Items]
Gross proceeds from sale of common shares	598	1,869	2,996
Less offering costs paid to Agent	(27)	(84)	(135)
Net proceeds from sale of common shares	$ 549	$ 1,724	$ 2,830
Number of common shares sold (in shares)	14,680	46,524	97,623
Average price per share (in dollars per share)	$ 40.74	$ 40.20	$ 30.70