Earnings Per Share - Schedule of Computations of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net loss attributable to JPMREIT stockholders, basic	$ (8,326)	$ (3,732)
Net loss attributable to JPMREIT stockholders, diluted	$ (8,326)	$ (3,732)
Denominator:
Weighted-average shares of common stock outstanding, basic	8,069	715
Weighted-average shares of common stock outstanding, diluted	8,069	715
Net loss per share of common stock, basic	$ (1.03)	$ (5.22)
Net loss per share of common stock, diluted	$ (1.03)	$ (5.22)