Segment Reporting - Summary of Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	$ 4,453	$ 1,050
Total Membership Revenue	605	176
Total Training Revenue	83	130
Total revenue	5,141	1,356
CLMBR [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	23	989
Total Membership Revenue	102	138
Total Training Revenue	2	90
Total revenue	127	1,217
FORME [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	109	61
Total Membership Revenue	43	38
Total Training Revenue	49	40
Total revenue	201	139
Wattbike [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	4,217	0
Total Membership Revenue	44	0
Total revenue	4,260	0
Ergatta [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	104	0
Total Membership Revenue	416	0
Total Training Revenue	32	0
Total revenue	553	0
United States [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	594	1,050
Total Membership Revenue	552	176
Total Training Revenue	83	130
Total revenue	1,229	1,356
United States [Member] \| CLMBR [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	23	989
Total Membership Revenue	102	138
Total Training Revenue	2	90
Total revenue	127	1,217
United States [Member] \| FORME [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	109	61
Total Membership Revenue	43	38
Total Training Revenue	49	40
Total revenue	201	139
United States [Member] \| Wattbike [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	358	0
Total Membership Revenue	0	0
Total Training Revenue	0	0
Total revenue	358	0
United States [Member] \| Ergatta [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	104	0
Total Membership Revenue	407	0
Total Training Revenue	32	0
Total revenue	543	0
Europe [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	3,074	0
Total Membership Revenue	50
Total revenue	3,124	0
Europe [Member] \| CLMBR [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total Membership Revenue	0
Total revenue	0	0
Europe [Member] \| FORME [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total Membership Revenue	0
Total revenue	0	0
Europe [Member] \| Wattbike [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	3,074	0
Total Membership Revenue	43
Total revenue	3,117	0
Europe [Member] \| Ergatta [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total Membership Revenue	7
Total revenue	7	0
Asia [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	361	0
Total revenue	361	0
Asia [Member] \| CLMBR [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total revenue	0	0
Asia [Member] \| FORME [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total revenue	0	0
Asia [Member] \| Wattbike [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	361	0
Total revenue	361	0
Asia [Member] \| Ergatta [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0	0
Total revenue	0	$ 0
Other [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	424
Total Membership Revenue	3
Total revenue	427
Other [Member] \| CLMBR [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0
Total Membership Revenue	0
Total revenue	0
Other [Member] \| FORME [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0
Total Membership Revenue	0
Total revenue	0
Other [Member] \| Wattbike [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	424
Total Membership Revenue	0
Total revenue	424
Other [Member] \| Ergatta [Member]
Disaggregation of Revenue [Line Items]
Total Fitness Product Revenue	0
Total Membership Revenue	3
Total revenue	$ 3