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
		Jun. 11, 2020	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($) shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2020 USD ($) shares
Numerator:
Net loss | $			$ (1,140)	$ (1,165)	$ (5,255)	$ (6,046)
Denominator:
Basic weighted average common shares outstanding (in shares)	[1]		5,086	3,308	4,309	3,196
Diluted weighted average common shares outstanding (in shares)	[1]		5,086	3,308	4,309	3,196
Reverse stock split ratio		0.2

[1] * Shares outstanding for the nine months ended September 30, 2020 have been restated for the 1-for-5 reverse stock split effective June 11, 2020.