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Note 12 - Related Party Transactions (Details Textual)					3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 13, 2018 USD ($)	Jul. 31, 2017 USD ($)	May 26, 2017 USD ($) ft²	Jan. 09, 2013 USD ($) ft²	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2020 USD ($)	Aug. 02, 2017 USD ($)
Lessee, Operating Lease, Liability, to be Paid, Total					$ 3,005,333		$ 3,005,333
Leasehold Improvements and Furniture and Fixtures [Member]
Impairment of Long-Lived Assets to be Disposed of									$ 100,000
Outside Counsel [Member]
Legal Fees					184,000	$ 122,000	303,000	$ 235,000
Accounts Payable, Related Parties					106,000		106,000
Dr. Eric A. Rose [Member] | Consulting Agreement [Member]
Accounts Payable, Related Parties					50,000		50,000
Consulting Agreement, Term (Year)	2 years
Related Party Transaction, Annual Amount	$ 200,000
Related Party Transaction, Expenses from Transactions with Related Party					$ 50,000		$ 100,000
MacAndrews and Forbes Incorporated [Member] | The New HQ Lease [Member]
Lessee, Operating Lease, Term of Contract (Year)			10 years
Area of Real Estate Property (Square Foot) | ft²			3,200
Monthly Rent During Initial Period			$ 25,333
Monthly Rent, Initial Period (Month)			63 months
Monthly Rent After Initial Period			$ 29,333
Monthly Facility Fee, Second Year			$ 3,333
Monthly Facility Fee, Yearly Rate Increase After Second Year			5.00%
Monthly Facility Fee, Final Year			$ 4,925
Lessee, Operating Lease, Liability, to be Paid, Total											$ 900,000
MacAndrews and Forbes Incorporated [Member] | The Old HQ Sublease [Member]
Area of Real Estate Property (Square Foot) | ft²				6,676
Monthly Rent During Initial Period				$ 60,000
Monthly Rent After Initial Period				$ 63,400
Lessee, Operating Lease, Liability, Estimate to be Paid Had No Changes Occurred										$ 2,400,000
Business Exit Costs									$ 1,100,000
MacAndrews and Forbes Incorporated [Member] | The Replacement M&F Sublease [Member]
Rent Concession Period (Month)		2 months
Monthly Rent, First Twelve Months		$ 36,996
Monthly Rent, Year Two		37,831
Monthly Rent, Thereafter		$ 38,665
MacAndrews and Forbes Incorporated [Member] | The Old HQ Sublease Termination Agreement [Member]
Lessee, Operating Lease, Liability, to be Paid, Total											1,100,000
MacAndrews and Forbes Incorporated [Member] | The New HQ Lease and Old HQ Sublease Termination Agreements [Member]
Lessee, Operating Lease, Liability, to be Paid, Total											$ 2,000,000.0

X

- Definition

The length of time of the consulting agreement.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

The amount of the monthly facility fee during the final year of the lease term.

+ References

No definition available.

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- Definition

The amount of the monthly facility fee during the second year of the lease term.

+ References

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- Definition

The percentage rate increase to the monthly facility fee per year following the second year of the lease term.

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No definition available.

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- Definition

The amount of the monthly rental payments due under the rental agreement entered into after the initial period of the rental agreement.

+ References

No definition available.

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- Definition

The amount of the monthly rental payments due under the rental agreement entered into for the initial period of the rental agreement.

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- Definition

The amount of the monthly rental payments due under the rental agreement entered into for the first twelve months of the rental agreement.

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- Definition

The length of time of the initial period of the rental agreement in which the fixed monthly payments and other agreements may be different from the remainder of the rental agreement.

+ References

No definition available.

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- Definition

The amount of the monthly rental payments due under the rental agreement entered into for the remaining period following the second year of the rental agreement.

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No definition available.

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- Definition

The amount of the monthly rental payments due under the rental agreement entered into for the second year of the rental agreement.

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- Definition

The annual amount of transactions due to a related party.

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- Definition

The length of time rent is excused in the least term.

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- Definition

Amount for accounts payable to related parties.

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- Definition

Area of a real estate property.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of lessee's undiscounted obligation for lease payment for operating lease.

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- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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