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Short-Term Loans Receivable (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 20, 2020 | Dec. 20, 2019
Short-Term Loans Receivable (Details) [Line Items] |  |  |  |  |
Notes receivable |  |  |  |  | $ 1,626,000
Accrued interest rate, percentage |  |  |  | 6.00% |
Interest income earned |  | $ 99,000 | $ 3,000 |  |
Loan due date | Apr. 28, 2021 | Jun. 29, 2021 |  |  |
Loan extended date |  | Dec. 01, 2021 |  |  |
Loan extended date |  | $ 1,637,000 | $ 2,239,000 |  |
Outstanding loans receivable and accrued interest assigned as payment for purchase price |  | $ 1,691,000 |  |  |
June and December 2020 [Member] |  |  |  |  |
Short-Term Loans Receivable (Details) [Line Items] |  |  |  |  |
Accrued interest rate, percentage |  | 6.00% |  |  |
Interest income earned |  | $ 4,000 |  |  |
Aggregate principal amount |  | 380,000 |  |  |
Outstanding loans receivable and accrued interest assigned as payment for purchase price |  | 359,000 |  |  |
Repayment of remaining outstanding |  | 21,000 |  |  |
June 2020 [Member] |  |  |  |  |
Short-Term Loans Receivable (Details) [Line Items] |  |  |  |  |
Interest income earned |  | 11,000 |  |  |
Aggregate principal amount |  | 300,000 |  |  |
Outstanding balance |  | $ 214,000 |  |  |
Lion Financial Group Limited [Member] |  |  |  |  |
Short-Term Loans Receivable (Details) [Line Items] |  |  |  |  |
Accrued interest rate, percentage |  | 6.00% |  |  |

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- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References No definition available. + Details
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