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Discontinued Operations - Summary of Assets and Liabilities From Discontinued Operation (Details) - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
ASSETS    
Cash, cash equivalents and restricted cash $ 146 $ 832
Accounts receivable, net 69 1,797
Deposits 0 9
Prepaid expenses and other 15 208
Deposits and other 0 248
Operating lease right-of-use assets 0 746
Property and equipment, net 0 121
Total assets from discontinued operations 230 3,961
LIABILITIES    
Accounts payable 611 1,057
Accrued expenses and other 48 1,188
Deferred revenue 12 118
Operating lease right-of-use liabilities 0 772
Total liabilities from discontinued operations $ 671 $ 3,135