Note 11 - Fair Value Measurements and Other Financial Instruments (Details Textual) - USD ($)	3 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Jul. 19, 2018
Convertible Notes Payable, Total	$ 1,698,169
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(322,773)
Adjustment to Additional Paid in Capital, Related Party Debt Restructuring	457,060
Gain (Loss) on Derivative Instruments, Net, Pretax, Total	$ (134,885)	$ 73,291
Lenders [Member]
Debt Instrument, Face Amount			$ 1,351,482

Amount of increase (decrease) in additional paid in capital (APIC) resulting from related party debt restructuring.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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