Note 10 - 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	(508,624)	$ (773,000)
Adjustment to Additional Paid in Capital, Related Party Debt Restructuring	$ 457,060
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.

No definition available.

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- Definition

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.

+ References

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- Definition

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

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- Definition

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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