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Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) Segment | Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Allowance for credit losses related to notes receivable outstanding |  | $ 0 | $ 0 |
Intangible assets impairment charges |  |  | 0 |
Goodwill impairment charges |  | 0 |  |
Deferred tax assets |  | 4,488 | $ 4,488 | $ 4,402
Percentage of revenue specific to customer from net revenue |  |  | 8.00% | 10.00%
Accounts receivable |  | 600 | $ 600 |
Selling, General and Administrative Expenses [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Advertising and promotion expense |  |  | $ 400 | $ 400
Maximum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue |  |  | 80.00% |
American Laboratory Trading [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 5,600 |  |  |
ASC 606 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of reporting segment | Segment |  |  | 2 |
Deferred revenue |  | $ 500 | $ 500 |
ASC 606 [Member] | Maximum [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue |  |  | 1.00% |

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