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Summary of Significant Accounting Policies - Schedule of Gross Accounts Receivable Balance Concentrations by Major Category (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items] |  |
Gross accounts receivable | $ 30,907 | $ 36,104
Gross accounts receivable, percentage | 100.00% | 100.00%
Rental |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Gross accounts receivable | $ 4,190 | $ 3,003
Gross accounts receivable, percentage | 13.60% | 8.30%
Business To Business And Other Receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Gross accounts receivable | $ 26,717 | $ 33,101
Gross accounts receivable, percentage | 86.40% | 91.70%

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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522 + Details
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