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Note 5 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Mar. 29, 2021	Dec. 31, 2022	Dec. 31, 2021
Depreciation, Total		$ 800	$ 600
Proceeds from Sale of Buildings		0	23,076
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property		$ 0	$ 6,894
The Premises at 555 N Research Place, Central Islip, NY [Member]
Proceeds from Sale of Buildings	$ 24,400
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	6,900
Proceeds from Sale of Buildings, Net	14,000
The Premises at 555 N Research Place, Central Islip, NY [Member] | HSBC Bank Second Mortgage Loan [Member]
Repayments of Debt	$ 9,400

X

- Definition

The cash inflow from sale of buildings, net of cash outflows.

+ References

No definition available.

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Section 45
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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2443-110228

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The cash inflow from sale of buildings.

+ References

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-Publisher FASB
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-Topic 230
-SubTopic 10
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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 15
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