v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities Subject to Fair Value Measurements (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Assets:          
PropTech convertible trading debt securities $ 1,229   $ 1,229   $ 1,229
Long-term investments          
PropTech convertible trading debt securities         1,229
Long-term investment securities at fair value 3,183   3,183   3,170
Total long-term investments 3,183   3,183   4,399
Total assets 95,103   95,103   112,933
Liabilities:          
Fair value of the derivative embedded within convertible debt         0
Total         0
Loss on changes in fair value of the derivative embedded within convertible debt 0 $ (16,969) 0 $ (17,715) (28,482)
Money Market Funds          
Assets:          
Cash and cash equivalents 90,529   90,529   108,372
Certificates of Deposit          
Assets:          
Cash and cash equivalents 162   162   162
Certificates of Deposit | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent          
Assets:          
Cash and cash equivalents 162   162    
Certificates of Deposit | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent          
Assets:          
Cash and cash equivalents         162
Quoted Prices in Active Markets for Identical Assets (Level 1)          
Assets:          
PropTech convertible trading debt securities 0   0    
Long-term investments          
PropTech convertible trading debt securities         0
Long-term investment securities at fair value 0   0   0
Total long-term investments 0   0   0
Total assets 90,529   90,529   108,372
Liabilities:          
Fair value of the derivative embedded within convertible debt         0
Total         0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds          
Assets:          
Cash and cash equivalents 90,529   90,529   108,372
Liabilities:          
Current restricted assets 5,995   5,995   4,716
Non-current restricted assets 2,649   2,649   2,483
Quoted Prices in Active Markets for Identical Assets (Level 1) | Certificates of Deposit          
Assets:          
Cash and cash equivalents 0   0   0
Significant Other Observable Inputs (Level 2)          
Assets:          
PropTech convertible trading debt securities 0   0    
Long-term investments          
PropTech convertible trading debt securities         0
Long-term investment securities at fair value 0   0   0
Total long-term investments 0   0   0
Total assets 162   162   162
Liabilities:          
Fair value of the derivative embedded within convertible debt         0
Total         0
Significant Other Observable Inputs (Level 2) | Money Market Funds          
Assets:          
Cash and cash equivalents 0   0   0
Significant Other Observable Inputs (Level 2) | Certificates of Deposit          
Assets:          
Cash and cash equivalents 162   162   162
Significant Unobservable Inputs (Level 3)          
Assets:          
PropTech convertible trading debt securities 1,229   1,229    
Long-term investments          
PropTech convertible trading debt securities         1,229
Long-term investment securities at fair value 0   0   0
Total long-term investments 0   0   1,229
Total assets 1,229   1,229   1,229
Liabilities:          
Fair value of the derivative embedded within convertible debt         0
Total         0
Significant Unobservable Inputs (Level 3) | Money Market Funds          
Assets:          
Cash and cash equivalents 0   0   0
Significant Unobservable Inputs (Level 3) | Certificates of Deposit          
Assets:          
Cash and cash equivalents $ 0   $ 0   $ 0