Earnings Per Share - Schedule of Computations of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Net loss attributable to JPMREIT stockholders, basic	$ (3,633)	$ (2,582)	$ (5,205)	$ (9,000)
Net loss attributable to JPMREIT stockholders, diluted	$ (3,633)	$ (2,582)	$ (5,205)	$ (9,000)
Denominator:
Weighted-average shares of common stock outstanding, basic	16,811	7,093	15,332	5,525
Weighted-average shares of common stock outstanding, diluted	16,811	7,093	15,332	5,525
Net loss per share of common stock, basic	$ (0.22)	$ (0.36)	$ (0.34)	$ (1.63)
Net loss per share of common stock, diluted	$ (0.22)	$ (0.36)	$ (0.34)	$ (1.63)