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Non-voting common stock conversion to voting common stock ratio

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Percentage of the issuance of common stock that warrants or rights were issued to purchase.

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Share based compensation arrangement by share based payment award percentage applied on outstanding shares of common stock for automatically increase on each year.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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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.

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Face amount or stated value per share of common stock.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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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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The cash outflow for cost incurred directly with the issuance of an equity security.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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The cash inflow from the additional capital contribution to the entity.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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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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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average grant-date fair value of options vested.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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Note 5 - Equity (Details Textual)							1 Months Ended	3 Months Ended						6 Months Ended	9 Months Ended		12 Months Ended
Note 5 - Equity (Details Textual)	Jan. 01, 2019 shares	Sep. 20, 2018 shares	Aug. 01, 2018 $ / shares shares	Jun. 30, 2018 shares	May 09, 2018 USD ($) $ / shares shares	Apr. 03, 2018 USD ($) $ / shares shares	Apr. 30, 2018 shares	Sep. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($) $ / shares shares	Sep. 25, 2019 shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) $ / shares shares	Jan. 29, 2018 USD ($) $ / shares shares	Dec. 31, 2017 $ / shares shares
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares								$ 4.60							$ 4.60		$ 4.60		$ 5.17
Proceeds from Issuance of Common Stock \| $																$ 15,174,581
Stock Issued During Period, Shares, Issued for Services															253,707		200,009
Stock Issued During Period, Value, Issued for Services \| $								$ 40,935	$ 159,101	$ 192,396		$ 176,650	$ 176,650		$ 392,432		$ 553,303
Preferred Stock, Shares Authorized						10,000,000		10,000,000					10,000,000		10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share \| $ / shares						$ 0.001		$ 0.001					$ 0.001		$ 0.001		$ 0.001
Preferred Stock, Shares Outstanding, Ending Balance								0							0		0
Non-voting To Voting Common Stock, Conversion Ratio						1
Common Stock, Shares Authorized						200,000,000		200,000,000					200,000,000		200,000,000		200,000,000
Common Stock, Par or Stated Value Per Share \| $ / shares						$ 0.001		$ 0.001					$ 0.001		$ 0.001		$ 0.001
Common Stock, Shares, Outstanding, Ending Balance								15,842,855							15,842,855		15,239,148
Class of Warrant or Right, Issued in Period															0		3,166,492
Class of Warrant or Right, Issued During Period, Exercise Price \| $ / shares																	$ 4.47
Class of Warrant or Right, Exercised During Period																	34,615
Class of Warrant or Right, Cancelled During Period																	15,385
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance								5,905,583							5,905,583		4,535,681		2,628,749
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross															1,461,715		2,034,525
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance \| $ / shares								$ 2.94							$ 2.94		$ 3.31		$ 1.31
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Total															91,813
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period															10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term															7 years 233 days		7 years 302 days
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount \| $																	$ 4,500,000
Share-based Payment Arrangement, Expense \| $															$ 2,900,000
Graded Vesting Method [Member]
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount \| $																	3,300,000
Cliff Vesting Method [Member]
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount \| $																	$ 1,200,000
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross															1,461,715
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition																	3 years
Share-based Payment Arrangement, Expense \| $															$ 2,500,000
Performance Shares [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $																	$ 2,600,000
Performance Shares [Member] \| Share-based Payment Arrangement, Tranche One [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition																	335 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $																	$ 1,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage																	50.00%
Performance Shares [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition																	2 years 153 days
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $																	$ 1,300,000
The 2018 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						4,160,000
Share Based Compensation Arrangement By Share Based Payment Award, Percentage Applied on Outstanding Shares of Common Stock For Automatically Increase on Each Year						5.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	761,957
The 2009 Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance						554,963
The 2018 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award, Percentage Applied on Outstanding Shares of Common Stock For Automatically Increase on Each Year								2.00%							2.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized								208,500							208,500
World Wide Holdings, LLC [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		50,000
Class of Warrant or Right, Exercised During Period		34,615
Class of Warrant or Right, Cancelled During Period		15,385
Warrants Issued to Underwriter [Member]
Class of Warrant or Right, Issued in Period																	38,400
Class of Warrant or Right, Issued During Period, Exercise Price \| $ / shares																	$ 6.25
Warrants Issued to Investors to Purchase Common Stock [Member]
Class of Warrant or Right, Issued in Period																	2,283,740
Class of Warrant or Right, Issued During Period, Exercise Price \| $ / shares																	$ 4.25
Warrants Issued for Services [Member]
Class of Warrant or Right, Issued in Period																	844,352
Warrants and Rights Outstanding \| $																	$ 2,203,506
Warrants Issued for Services [Member] \| Cancer Revolution, LLC [Member]
Class of Warrant or Right, Issued in Period																	425,000
Warrants Issued for Services [Member] \| Cancer Biotech, LLC [Member]
Class of Warrant or Right, Issued in Period																	225,000
Warrants Issued for Services [Member] \| Inception Capital Management, LLC [Member]
Class of Warrant or Right, Issued in Period																	144,352
Warrants Issued for Services [Member] \| World Wide Holdings, LLC [Member]
Class of Warrant or Right, Issued in Period																	50,000
Class of Warrant or Right, Issued During Period, Exercise Price \| $ / shares																	$ 5
Warrants Issued for Services [Member] \| FundAthena, Inc [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																		6,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares																		$ 5
Class of Warrant or Right, Issued in Period															0
Accounts Payable, Total \| $																		$ 30,000
Conversion of Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Converted				1,394,953
Conversion of Stock, Shares Issued				9,324,177			1,235,219
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance \| $ / shares								$ 9.80							$ 9.80
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period															4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value \| $ / shares															$ 7.93
Maximum [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance \| $ / shares								1.62							1.62
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance \| $ / shares								0.001							$ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period															1 year
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value \| $ / shares															$ 0.001
Minimum [Member] \| Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance \| $ / shares								$ 1.45							$ 1.45
Weighted Average [Member] \| Share-based Payment Arrangement, Option [Member] \| Graded Vesting Method [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition																	2 years 124 days
Weighted Average [Member] \| Share-based Payment Arrangement, Option [Member] \| Cliff Vesting Method [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition																	251 days
IPO [Member]
Stock Issued During Period, Shares, New Issues						1,280,000
Sale of Stock, Price Per Share \| $ / shares						$ 5
Proceeds from Issuance Initial Public Offering \| $						$ 5,025,000
Payments of Stock Issuance Costs \| $						$ 895,000
Percentage of Common Stock Issuance of Warrant or Right Issued						3.00%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						38,400
Private Placement [Member]
Stock Issued During Period, Shares, New Issues					828,500									350,000	350,000
Sale of Stock, Price Per Share \| $ / shares					$ 12.07
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares					$ 15.62
Proceeds from Issuance of Common Stock \| $					$ 9,250,000
Private Placement [Member] \| Securities Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues			1,174,440
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			2,283,740
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares			$ 4.25
Private Placement [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right					621,376
Private Placement [Member] \| Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares					$ 4.25
IPO and Private Placement [Member]
Stock Issued During Period, Shares, New Issues																	3,282,940
Proceeds from Issuance of Common Stock \| $																	$ 16,400,000