Note 16 - Supplemental Disclosure for Statements of Cash Flows  | 
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2021  | |||
| Notes to Financial Statements | |||
| Cash Flow, Supplemental Disclosures [Text Block] | 
 During the  
three -month periods ended  March  
31,  2021  and 2020,  we paid interest aggregating $3,000 three -month period ended  March 31, 2021,  we collected approximately $2.925  million of stock subscriptions which were received prior to the filing of our Annual Report on Form 10 -K for the year ended  December 31, 2020  and were included in stock subscriptions receivable in our consolidated balance sheet as of  December 31, 2020.  In  February 2020,  the Company amended its existing office lease and recognized a right-of-use lease asset in exchange for a lease liability of $100,432.  During the three -month period ended  March 31, 2021,  we issued 30,018  shares of our Common Stock valued at $77,000  as matching contributions to our 401 (k) Plan. During the three -month period ended  March 31, 2020,  we issued 53,315  shares of our Common Stock valued at $65,000  to our employees as partial payment in lieu of cash for their 2019  bonuses. |