Note 5 - Related Party Lease - Lease Information (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Right-of-use operating lease assets – related party, net	$ 477,000	$ 571,000
Non-current lease liability	274,000	$ 398,000
Lease Agreement with Z3 Investment LLC [Member]
Right-of-use operating lease assets – related party, net	3,754,000
Non-current lease liability	$ 3,740,000
Weighted average remaining lease term (Year)	5 years 3 months 18 days
Discount rate	22.00%
Lease Agreement with Z3 Investment LLC [Member] \| Current Liabilities [Member]
Current lease liability (included in other current liabilities)	$ 200,000

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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