Marketable Equity Securities (Details Narrative) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| OncoCyte Corporation [Member] | ||
| Schedule of Equity Method Investments [Line Items] | ||
| Investment Owned, Balance, Shares | 1.1 | 3.6 |
| Investment Owned, at Fair Value | $ 2.4 | $ 8.7 |
| Share Price | $ 2.17 | $ 2.39 |
| Equity Method Investment, Realized Gain (Loss) on Disposal | $ 6.0 | $ 3.1 |
| Marketable Securities, Unrealized Gain (Loss) | $ 2.2 | 2.5 |
| AgeX Therapeutics Inc [Member] | ||
| Schedule of Equity Method Investments [Line Items] | ||
| Equity Method Investment, Realized Gain (Loss) on Disposal | 0.8 | |
| Marketable Securities, Unrealized Gain (Loss) | $ 1.3 | |