Segments - Income statement (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Operating revenues
Operating revenues		$ 96,846	$ 51,630
Operating costs:
Operating expenses		88,044	46,546
General and administrative		11,430	15,455
Severance expense	$ 2,200	2,208
Depreciation and amortization		8,492	11,830
Total operating costs		110,174	73,831
Loss from operations		(13,328)	(22,201)
Other income (expense):
Interest income		576	317
Interest expense		(103)	(31)
Other income, net		612	411
Gain from employee retention credit			2,966
Loss before income tax		(12,243)	(18,538)
Income tax expense		96	(107)
Net loss		(12,147)	(18,645)
Other comprehensive income:
Net unrealized income (loss) on foreign exchange rate translation		161	(1,063)
Comprehensive loss		(11,986)	(19,708)
Fee Revenue
Operating revenues
Operating revenues		61,447	46,071
Operating costs:
Operating expenses		52,895	40,987
Reimbursable Revenue
Operating revenues
Operating revenues		35,399	5,559
Operating costs:
Operating expenses		35,149	5,559
Operating segment | USA Operations
Operating revenues
Operating revenues		83,823	36,352
Operating costs:
Operating expenses		75,652	34,799
General and administrative		10,360	14,140
Severance expense		2,208
Depreciation and amortization		6,566	9,721
Total operating costs		94,786	58,660
Loss from operations		(10,963)	(22,308)
Other income (expense):
Interest income		333	225
Interest expense		(75)	(28)
Other income, net		553	385
Gain from employee retention credit			2,966
Loss before income tax		(10,152)	(18,760)
Income tax expense		96	(107)
Net loss		(10,056)	(18,867)
Other comprehensive income:
Comprehensive loss		(10,056)	(18,867)
Operating segment | USA Operations | Fee Revenue
Operating revenues
Operating revenues		49,045	31,096
Operating costs:
Operating expenses		41,124	29,543
Operating segment | USA Operations | Reimbursable Revenue
Operating revenues
Operating revenues		34,778	5,256
Operating costs:
Operating expenses		34,528	5,256
Operating segment | Canada Operations
Operating revenues
Operating revenues		13,023	15,278
Operating costs:
Operating expenses		12,392	11,747
General and administrative		1,070	1,315
Depreciation and amortization		1,926	2,109
Total operating costs		15,388	15,171
Loss from operations		(2,365)	107
Other income (expense):
Interest income		243	92
Interest expense		(28)	(3)
Other income, net		59	26
Loss before income tax		(2,091)	222
Net loss		(2,091)	222
Other comprehensive income:
Net unrealized income (loss) on foreign exchange rate translation		161	(1,063)
Comprehensive loss		(1,930)	(841)
Operating segment | Canada Operations | Fee Revenue
Operating revenues
Operating revenues		12,402	14,975
Operating costs:
Operating expenses		11,771	11,444
Operating segment | Canada Operations | Reimbursable Revenue
Operating revenues
Operating revenues		621	303
Operating costs:
Operating expenses		$ 621	$ 303