Earnings Per Share - Schedule of Net Loss and Weighted Average Number of Shares Outstanding (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net loss attributable to JPMREIT stockholders, basic	$ (2,188)	$ (1,660)	$ (11,188)	$ (1,662)
Net loss attributable to JPMREIT stockholders, diluted	$ (2,188)	$ (1,660)	$ (11,188)	$ (1,662)
Weighted-average shares of common stock outstanding, basic	9,488	928	6,860	351
Weighted-average shares of common stock outstanding, diluted	9,488	928	6,860	351