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Note 14 - Convertible Notes Payable (Details Textual) - USD ($) |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 10, 2020 | Jun. 29, 2020 | Jun. 12, 2020 | Jun. 10, 2020 | May 06, 2020 | Mar. 12, 2020 | Feb. 13, 2020 | Jan. 13, 2020 | Jul. 10, 2019 | Jul. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Mar. 30, 2020 | Sep. 23, 2015
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,681
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12.00 | $ 28.80
Payments of Stock Issuance Costs, Commitment Fees |  |  |  |  |  |  |  |  | $ 50,000 |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Due Diligence Fee (in shares) |  | 17,071 |  |  | 14,368 |  |  |  | 33,334 |  |  |  |  |  |
Stock Issued During Period, Value, Issued for Due Diligence Fee |  | $ 100,000 |  |  | $ 133,333 |  |  |  | $ 400,000 |  |  |  |  |  |
Payments of Stock Issuance Costs, Banker Fees |  |  |  |  |  |  |  |  | 193,500 |  |  |  |  |  |
Payments of Stock Issuance Costs, Legal Fees |  |  |  |  |  |  |  |  | 71,330 |  |  |  |  |  |
Class of Warrant or Right, Recorded as Debt Discount |  |  |  |  |  |  |  |  | $ 595,662 |  |  |  |  |  |
Share Price (in dollars per share) |  |  | $ 5.20 |  |  | $ 6.08 |  |  |  |  |  |  |  |  |
Repayments of Convertible Debt |  |  |  |  |  |  |  |  |  |  |  | $ (0) | $ 4,509,250 |  |
Shares Issued, Price Per Share (in dollars per share) |  | $ 5.86 |  |  | $ 9.28 |  |  |  |  |  |  |  |  |  |
Conversion of Senior Secured Convertible Note to Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Original Debt, Amount |  |  |  | $ 3,789,000 |  |  |  |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) |  |  |  | 728,654 |  |  |  |  |  |  |  |  |  |  |
Investor Warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  | 5 years |  |  | 5 years |  |  |  | 5 years |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 178,125 |  |  | 237,500 |  |  |  | 250,000 |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 9.28 |  |  | $ 9.28 |  |  |  | $ 12.00 |  |  |  |  |  |
Repayments of Convertible Debt |  |  |  |  |  |  |  |  |  | $ 2,415,000 |  |  |  |  |
Warrants and Rights Outstanding |  | $ 511,402 |  |  | $ 876,937 |  |  |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  |  |  |  |  |  |  |  |  | 1,218,163 |  |  |  |  |
Secured Redeemable Convertible Note [Member] | February 2020 Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  | $ 5.20 | $ 9.20 |  |  |  |  |  |  |  |
The Note [Member] | Senior Secured Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  | $ 3,060,000 |  |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  |  |  |  |  |  |  | 2,550,000 |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  |  |  |  |  |  | 510,000 |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal due in 180 Days |  |  |  |  |  |  |  |  | 918,000 |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal due in 270 Days |  |  |  |  |  |  |  |  | $ 1,071,000 |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  |  |  |  | $ 12.00 |  |  |  |  |  |
Amended Note [Member] | Senior Secured Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 3,789,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount, Total |  |  |  |  |  | $ 641,215 |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  | $ 5.20 |  |  |  |  |  |  |  |  |
Interest Expense, Debt, Total |  |  |  |  |  | $ 729,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Beneficial Conversion Feature, Per Share (in dollars per share) |  |  |  |  |  | $ 0.88 |  |  |  |  |  |  |  |  |
Long-term Debt, Total |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |
January 2020 Note [Member] | Secured Redeemable Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 157,000 |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  |  |  |  | $ 12.00 |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |
Stock Issued During Period, Shares, Commitment Fees (in shares) |  |  |  |  |  |  |  | 81,250 |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  |  |  |  | $ 75,000 |  |  |  |  |  |  |
Debt Instrument, Covenant, Shares to be Paid, Commitment Fee, Repaid Prior to Maturity (in shares) |  |  |  |  |  |  |  | 6,250 |  |  |  |  |  |  |
Repayments of Convertible Debt |  |  | $ 211,984 |  |  |  |  |  |  |  |  |  |  |  |
February 2020 Note [Member] | Secured Redeemable Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 126,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Commitment Fees (in shares) |  |  |  |  |  |  | 6,250 |  |  |  |  |  |  |  |
Debt Instrument, Fee Amount |  |  |  |  |  |  | $ 57,500 |  |  |  |  |  |  |  |
Repayments of Convertible Debt | $ 170,442 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Deemed Dividend Expense |  |  |  |  |  | $ 70,998 |  |  |  |  |  |  |  |  |
Legal Fees |  |  |  |  |  |  | $ 6,000 |  |  |  |  |  |  |  |
February 2020 Note [Member] | Secured Redeemable Convertible Note [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
February 2020 Note [Member] | Secured Redeemable Convertible Note [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Premium Payment Percentage |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |
May 2020 Note [Member] | Secured Redeemable Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | 2,415,000 |  |  |  |  |  |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  |  |  | $ 2,100,000 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  |  |  |  | $ 9.28 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  | $ 268,333 |  |  |  |  |  |  |  |  |  |
Placement Fee, Percent of Aggregate Gross Proceeds |  |  |  |  | 7.00% |  |  |  |  |  |  |  |  |  |
June 2020 Note [Member] | Secured Redeemable Convertible Note [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | 1,811,250 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  | $ 1,575,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Conversion Price (in dollars per share) |  | $ 9.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Convertible Debt |  |  |  |  |  |  |  |  |  |  | $ 1,811,250 |  |  |  |
Debt Instrument, Periodic Payment, Principal |  | $ 201,250 |  |  |  |  |  |  |  |  |  |  |  |  |
Placement Fee, Percent of Aggregate Gross Proceeds |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of Debt Issuance Costs and Discounts, Total |  |  |  |  |  |  |  |  |  | $ 957,919 |  |  |  |  |

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- Definition The amount per share of a favorable spread to a debt holder between the amount of debt being converted and the value of the securities received upon conversion. This is an embedded conversion feature of convertible debt issued that is in-the-money at the commitment date. + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 + Details
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- Definition The amount of the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 + Details
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