XML 35 R25.htm IDEA: XBRL DOCUMENT
v3.20.2

Note 6 - Marketable Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Notes Tables |
Marketable Securities [Table Text Block] |
|  | As of September 30, 2020 |  |  | As of December 31, 2019 |
Marketable securities: |  |  |  |  |  |  |  |
Amortized cost (1) |  | $ | 114,531 |  |  | $ | 12,064 |
Unrealized gains/(losses), net (1) |  |  | 442,260 |  |  |  | (2,711 | )
Total fair value |  | $ | 556,791 |  |  | $ | 9,353 |

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration