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Discontinued Operation - Summary of Assets and Liabilities From Discontinued Operation (Details) - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
ASSETS    
Cash, cash equivalents and restricted cash $ 110 $ 146
Accounts receivable, net 0 69
Prepaid expenses and other 13 15
Total assets from discontinued operations 123 230
LIABILITIES    
Accounts payable 511 611
Accrued expenses and other 57 48
Deferred revenue 12 12
Total liabilities from discontinued operations $ 580 $ 671