The percentage of common stock for each share of convertible preferred stock that is converted.

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Amount of intrinsic value at the time of issuance.

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Number of convertible preferred shares issued during the period.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Accretion of temporary equity during the period due to cash, stock, and in-kind dividends. This item is an adjustment to net income necessary to derive net income apportioned to common stockholders and is to be distinguished from Temporary Equity, Accretion of Dividends (Temporary Equity, Accretion of Dividends).

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Note 4 - Stockholders' Equity, Stock Options and Warrants (Details Textual)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 30, 2019 shares	Sep. 30, 2019 USD ($) shares	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Dec. 31, 2018 $ / shares
Stock Issued During Period, Value, New Issues					$ 2,755,087
Temporary Equity, Dividends, Adjustment		$ 125,801		$ 146,199
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate				0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate				82.40%
Share-based Payment Arrangement, Expense		360,146	$ 339,954	$ 2,004,366	$ 800,322
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount		$ 310,403		$ 310,403
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 7.12		$ 10.13
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition				1 year 120 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				2.03%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term				10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 6.527
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate				1.39%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term				5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares				$ 3.368
Equity Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
Equity Incentive Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				3 years
Series D Preferred Stock [Member]
Preferred Stock, Shares Issued, Total \| shares	3,500,000
Convertible Preferred Stock, Conversion Rate	10
Series E Convertible Preferred Stock [Member]
Convertible Preferred Stock, Conversion Rate				0.00056857
Stock Issued During Period, Value, New Issues				$ 2,577,000
Stock Issued During Period, Shares, Convertible Preferred Shares Issued \| shares		173.4		257.7
Preferred Stock, Beneficial Conversion Feature		$ 182,000		$ 289,936
Temporary Equity, Dividends, Adjustment		$ 125,801		$ 146,199