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Note 7 - Commitments and Contingencies (Details Textual) - USD ($)		1 Months Ended	3 Months Ended					12 Months Ended
	Apr. 16, 2018	Jul. 31, 2018	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2009	Dec. 31, 2019	Feb. 28, 2019	Oct. 31, 2017
Operating Lease, Rent Expense Per Month	$ 2,050
Payments to Acquire Intangible Assets			$ 44,744	$ 9,220
National Institute of Health [Member]
Royalty on Sales, Percentage										1.00%
Royalty Term (Year)										21 years
Royalty Payment, Annual Minimum										$ 20,000
Other Commitment, Total							$ 191,393		$ 191,393		$ 280,000
Legal Fees							15,393
Accounts Payable, Other, Current							176,000		176,000
Accrued Royalties, Current							$ 140,000		140,000
Other Expenses, Total									$ 36,000
Extinguishment of Debt, Amount						$ 120,000
Accrued Patent Costs, Current						36,000
Payments for Royalties					$ 20,000	20,000
Payment for Contingent Consideration Liability, Operating Activities						240,000
Contingent Payments Annual Increase						20,000
Payments to Acquire Intangible Assets					$ 36,000
Finite-Lived Intangible Assets, Period Increase (Decrease), Total						$ (120,000)
Clinical Trial Agreement [Member] | MD Anderson [Member]
Long Term Contract, Estimated Cost								$ 2,000,000
Research Agreement [Member] | MD Anderson [Member]
Long Term Contract, Estimated Cost		$ 2,000,000
License Agreement [Member] | University of Pittsburgh [Member]
Licensing Fee, Amount												$ 25,000
Annual Maintenance Fee, First Three Years, Amount												25,000
Annual Maintenance Fee, After Year Three, Amount												40,000
Annual Royalty Payment Per Year, Minimum												$ 250,000
Share of Non-Royalty Sublicense Income, Percent												20.00%
License Agreement [Member] | University of Pittsburgh [Member] | Dosing of First Human Patient in a Phase I Clinical Trial [Member]
Milestone Payment												$ 3,975,000
License Agreement [Member] | University of Pittsburgh [Member] | Minimum [Member]
Percentage of Outstanding Shares for Warrant to Purchase Shares of Common Stock													1.50%
License Agreement [Member] | University of Pittsburgh [Member] | Maximum [Member]
Royalty Percent, Licensed Technology Covered by Patent												3.00%

X

- Definition

Accrued patent costs current.

+ References

No definition available.

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Balance Type:	credit
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X

- Definition

The annual maintenance fee after the third year of an agreement.

+ References

No definition available.

+ Details

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X

- Definition

The amount of annual maintenance fees for the first three years of an agreement.

+ References

No definition available.

+ Details

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X

- Definition

The minimum amount of royalty payment to be received each year.

+ References

No definition available.

+ Details

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X

- Definition

Annual increase in contingent payment.

+ References

No definition available.

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X

- Definition

The amount of the agreed upon licensing fee.

+ References

No definition available.

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X

- Definition

Estimated total cost of of long term contract.

+ References

No definition available.

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X

- Definition

The amount of a payment to be received upon achievement of an agreed upon milestone.

+ References

No definition available.

+ Details

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Namespace Prefix:	gnpx_
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X

- Definition

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease per month, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

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No definition available.

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X

- Definition

Percentage of outstanding shares for warrant to purchase shares of common stock.

+ References

No definition available.

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X

- Definition

Percentage of sales of royalty.

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No definition available.

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Balance Type:	na
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X

- Definition

Minimum of annual royalty payment.

+ References

No definition available.

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Balance Type:	debit
Period Type:	duration

X

- Definition

The percent of net sales of licensed technology covered by patents to be earned as royalty.

+ References

No definition available.

+ Details

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X

- Definition

Term of royalty agreement.

+ References

No definition available.

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X

- Definition

The share of non-royalty sublicense income, represented as a percent, to be received as part of an agreement.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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X

- Definition

Amount of increase (decrease) in carrying value of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

+ Details

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- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

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X

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

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X

- Definition

Amount of expense classified as other.

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- Definition

Amount of cash outflow, not made soon after acquisition date of business combination, to settle contingent consideration liability exceeding amount recognized at acquisition date. Includes, but is not limited to, measurement period adjustment and less amount paid soon after acquisition date.

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- Definition

The amount of cash paid for royalties during the current period.

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- Definition

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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