XML 36 R23.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 4 - Accrued Expenses (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  | 2020 |  |  | 2019 |
Accrued salaries and directors' fees |  | $ | 279,696 |  |  | $ | 1,732,702 |
Other accrued expenses |  |  | 79,585 |  |  |  | 118,338 |
Total accrued expenses |  | $ | 359,281 |  |  | $ | 1,851,040 |

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
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