Discontinued Operations - Summary of Aggregate Carrying Amounts of Major Classes of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets of discontinued operations:
Prepaid expenses and other current assets	$ 4	$ 4
Current assets of discontinued operations	4	4
Total assets of discontinued operations	4	4
Liabilities of discontinued operations:
Accounts payable	6	6
Accrued and other current liabilities	494	494
Total liabilities of discontinued operations	$ 500	$ 500