CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Revenue
Rental revenue	$ 54,042	$ 53,439	$ 54,131	$ 48,664	$ 51,446	$ 58,242	$ 107,570	$ 109,689	$ 161,612	$ 158,353	$ 218,347	$ 205,371
Other revenue	769	697	952	1,081	1,128	974	1,649	2,102	2,418	3,183	3,241	4,126
Total revenue	54,811	54,136	55,083	49,745	52,574	59,216	109,219	111,791	164,030	161,536	221,588	209,497
Cost of revenue	43,342	44,669	43,213	38,417	44,849	48,113	87,882	92,962	131,224	131,379	179,881	172,092
Gross profit	11,469	9,467	11,870	11,328	7,725	11,103	21,337	18,829	32,806	30,157	41,707	37,405
Operating expenses:
Servicing costs	1,100	1,103	990	1,025	1,131	1,207	2,093	2,337	3,193	3,362	4,311	4,337
Underwriting fees	422	480	468	419	423	488	948	910	1,370	1,330	1,919	1,828
Professional and consulting fees	1,169	1,623	2,655	2,322	2,259	2,921	4,278	5,180	5,447	7,502	6,694	10,539
Technology and data analytics	1,639	1,959	1,665	2,421	2,455	2,410	3,624	4,864	5,263	7,286	6,905	9,389
Compensation costs	4,915	5,566	6,855	6,752	6,470	5,377	12,421	11,847	17,336	18,599	22,732	25,090
General and administrative	2,664	2,746	2,934	3,276	3,649	3,926	5,680	7,580	8,344	10,854	10,938	14,288
Litigation expense, net				375						375	7,000	375
Total operating expenses	11,909	13,477	15,567	16,590	16,387	16,329	29,044	32,718	40,953	49,308	60,499	65,846
Loss from operations	(440)	(4,010)	(3,697)	(5,262)	(8,662)	(5,226)	(7,707)	(13,889)	(8,147)	(19,151)	(18,792)	(28,441)
Loss on partial extinguishment of debt	0	0	(2,391)				(2,391)		(2,391)		(2,391)	0
Interest expense and other fees	(4,264)	(4,098)	(5,189)	(5,074)	(4,405)	(4,282)	(9,287)	(8,686)	(13,551)	(13,760)	(17,822)	(19,264)
Interest income	287	427	620	223			1,047		1,334	223	1,697	744
Change in fair value of warrant liability	382	257	132	381	2,323	3,089	389	5,412	771	5,793	807	6,439
Loss before income taxes	(4,035)	(7,424)	(10,525)	(9,732)	(10,744)	(6,419)	(17,949)	(17,163)	(21,984)	(26,895)	(36,501)	(40,522)
(Provision) benefit for income taxes	(19)	(14)	(20)	(73)	(65)	(35)	(34)	(100)	(53)	(173)	(165)	50
Net loss	$ (4,054)	$ (7,438)	$ (10,545)	$ (9,805)	$ (10,809)	$ (6,454)	$ (17,983)	$ (17,263)	$ (22,037)	$ (27,068)	$ (36,666)	$ (40,472)
Weighted average common share outstanding - basic (in shares)	4,130,000	4,073,000	3,973,000	3,936,000	3,918,000	3,915,000	4,023,000	3,921,000	4,059,000	3,926,000	4,088,000	3,930,000
Weighted average common share outstanding - diluted (in shares)	4,130,000	4,073,000	3,973,000	3,936,000	3,918,000	3,915,000	4,023,000	3,921,000	4,059,000	3,926,000	4,088,000	3,930,000
Net loss per common share - basic (in dollars per share)	$ (0.98)	$ (1.83)	$ (2.65)	$ (2.49)	$ (2.76)	$ (1.65)	$ (4.47)	$ (4.40)	$ (5.43)	$ (6.89)	$ (8.97)	$ (10.30)
Net loss per common share - diluted (in dollars per share)	$ (0.98)	$ (1.83)	$ (2.65)	$ (2.49)	$ (2.76)	$ (1.65)	$ (4.47)	$ (4.40)	$ (5.43)	$ (6.89)	$ (8.97)	$ (10.30)