3.20.1 html 114 268 1 false 46 0 false 4 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.genprex.com/20191231/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Balance Sheets Sheet http://www.genprex.com/20191231/role/statement-balance-sheets Balance Sheets Statements 2 false false R3.htm 002 - Statement - Balance Sheets (Parentheticals) Sheet http://www.genprex.com/20191231/role/statement-balance-sheets-parentheticals Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Statements of Operations Sheet http://www.genprex.com/20191231/role/statement-statements-of-operations Statements of Operations Statements 4 false false R5.htm 004 - Statement - Statements of Changes in Stockholders' Equity Sheet http://www.genprex.com/20191231/role/statement-statements-of-changes-in-stockholders-equity Statements of Changes in Stockholders' Equity Statements 5 false false R6.htm 005 - Statement - Statements of Cash Flows Sheet http://www.genprex.com/20191231/role/statement-statements-of-cash-flows Statements of Cash Flows Statements 6 false false R7.htm 006 - Disclosure - Note 1 - Description of Business and Basis of Presentation Sheet http://www.genprex.com/20191231/role/statement-note-1-description-of-business-and-basis-of-presentation Note 1 - Description of Business and Basis of Presentation Notes 7 false false R8.htm 007 - Disclosure - Note 2 - Summary of Significant Accounting Policies Sheet http://www.genprex.com/20191231/role/statement-note-2-summary-of-significant-accounting-policies Note 2 - Summary of Significant Accounting Policies Notes 8 false false R9.htm 008 - Disclosure - Note 3 - Intellectual Property Sheet http://www.genprex.com/20191231/role/statement-note-3-intellectual-property Note 3 - Intellectual Property Notes 9 false false R10.htm 009 - Disclosure - Note 4 - Investment Unit Sheet http://www.genprex.com/20191231/role/statement-note-4-investment-unit Note 4 - Investment Unit Notes 10 false false R11.htm 010 - Disclosure - Note 5 - Equity Sheet http://www.genprex.com/20191231/role/statement-note-5-equity Note 5 - Equity Notes 11 false false R12.htm 011 - Disclosure - Note 6 - Related Party Transactions Sheet http://www.genprex.com/20191231/role/statement-note-6-related-party-transactions Note 6 - Related Party Transactions Notes 12 false false R13.htm 012 - Disclosure - Note 7 - Commitments and Contingencies Sheet http://www.genprex.com/20191231/role/statement-note-7-commitments-and-contingencies Note 7 - Commitments and Contingencies Notes 13 false false R14.htm 013 - Disclosure - Note 8 - Income Taxes Sheet http://www.genprex.com/20191231/role/statement-note-8-income-taxes Note 8 - Income Taxes Notes 14 false false R15.htm 014 - Disclosure - Note 9 - Subsequent Events Sheet http://www.genprex.com/20191231/role/statement-note-9-subsequent-events Note 9 - Subsequent Events Notes 15 false false R16.htm 015 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.genprex.com/20191231/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.genprex.com/20191231/role/statement-note-2-summary-of-significant-accounting-policies 16 false false R17.htm 016 - Disclosure - Note 5 - Equity (Tables) Sheet http://www.genprex.com/20191231/role/statement-note-5-equity-tables Note 5 - Equity (Tables) Tables http://www.genprex.com/20191231/role/statement-note-5-equity 17 false false R18.htm 017 - Disclosure - Note 8 - Income Taxes (Tables) Sheet http://www.genprex.com/20191231/role/statement-note-8-income-taxes-tables Note 8 - Income Taxes (Tables) Tables http://www.genprex.com/20191231/role/statement-note-8-income-taxes 18 false false R19.htm 018 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-2-summary-of-significant-accounting-policies-details-textual Note 2 - Summary of Significant Accounting Policies (Details Textual) Details 19 false false R20.htm 019 - Disclosure - Note 3 - Intellectual Property (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-3-intellectual-property-details-textual Note 3 - Intellectual Property (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-3-intellectual-property 20 false false R21.htm 020 - Disclosure - Note 4 - Investment Unit (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-4-investment-unit-details-textual Note 4 - Investment Unit (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-4-investment-unit 21 false false R22.htm 021 - Disclosure - Note 5 - Equity (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-5-equity-details-textual Note 5 - Equity (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-5-equity-tables 22 false false R23.htm 022 - Disclosure - Note 5 - Equity - Common Stock Purchase Warrant Activity (Details) Sheet http://www.genprex.com/20191231/role/statement-note-5-equity-common-stock-purchase-warrant-activity-details Note 5 - Equity - Common Stock Purchase Warrant Activity (Details) Details 23 false false R24.htm 023 - Disclosure - Note 5 - Equity - Assumptions (Details) Sheet http://www.genprex.com/20191231/role/statement-note-5-equity-assumptions-details Note 5 - Equity - Assumptions (Details) Details 24 false false R25.htm 024 - Disclosure - Note 5 - Equity - Stock Option Activity (Details) Sheet http://www.genprex.com/20191231/role/statement-note-5-equity-stock-option-activity-details Note 5 - Equity - Stock Option Activity (Details) Details 25 false false R26.htm 025 - Disclosure - Note 6 - Related Party Transactions (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-6-related-party-transactions-details-textual Note 6 - Related Party Transactions (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-6-related-party-transactions 26 false false R27.htm 026 - Disclosure - Note 7 - Commitments and Contingencies (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-7-commitments-and-contingencies-details-textual Note 7 - Commitments and Contingencies (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-7-commitments-and-contingencies 27 false false R28.htm 027 - Disclosure - Note 8 - Income Taxes (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-8-income-taxes-details-textual Note 8 - Income Taxes (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-8-income-taxes-tables 28 false false R29.htm 028 - Disclosure - Note 8 - Income Taxes - Income Tax Reconciliation (Details) Sheet http://www.genprex.com/20191231/role/statement-note-8-income-taxes-income-tax-reconciliation-details Note 8 - Income Taxes - Income Tax Reconciliation (Details) Details 29 false false R30.htm 029 - Disclosure - Note 9 - Subsequent Events (Details Textual) Sheet http://www.genprex.com/20191231/role/statement-note-9-subsequent-events-details-textual Note 9 - Subsequent Events (Details Textual) Details http://www.genprex.com/20191231/role/statement-note-9-subsequent-events 30 false false All Reports Book All Reports gnpx-20191231.xml gnpx-20191231.xsd gnpx-20191231_cal.xml gnpx-20191231_def.xml gnpx-20191231_lab.xml gnpx-20191231_pre.xml http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/us-gaap/2019-01-31 true true