Basis of Presentation and Summary of Significant Accounting Policies - Reconciliation of Basic and Diluted Loss per Share (Details) shares in Thousands, $ in Thousands				3 Months Ended						9 Months Ended		12 Months Ended
		Jun. 16, 2023	Jun. 15, 2023	Sep. 30, 2023 USD ($) shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($) shares	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022 USD ($) shares	Dec. 31, 2022 USD ($)
Numerator:
Net loss | $				$ (944)	$ (1,167)	$ (1,333)	$ (2,662)	$ (2,486)	$ (2,821)	$ (3,444)	$ (7,969)	$ (10,300)
Denominator:
Basic (in shares)	[1]			3,514			1,313			2,868	1,087
Diluted (in shares)	[1]			3,514			1,313			2,868	1,087
Reverse stock split ratio		0.142857	0.142857

[1] * Shares outstanding for prior periods have been restated for the 1-for-7 reverse stock split effective June 16, 2023.