Discontinued Operations - Condensed consolidated balance sheets (Details) - Discontinued operations - Canadian subsidiary $ in Thousands	Dec. 31, 2021 USD ($)
Carrying amounts of assets included as part of discontinued operations:
Cash	$ 1,545
Accounts receivable, net of allowance	1,292
Other current assets	1,665
Total current assets of discontinued operations	4,502
Carrying amounts of liabilities included as part of discontinued operations:
Current portion of long-term debt and capital lease obligations	14
Accounts payable	559
Accrued expenses	1,475
Total current liabilities of discontinued operations	$ 2,048