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Note 7 - Property, Plant and Equipment, Net (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Depreciation, Total	$ 2,100	$ 2,300	$ 6,800	$ 7,200
Assets Held-for-sale, Not Part of Disposal Group, Total					$ 1,600
Gain (Loss) on Sale of Properties	1,596	$ 403	1,596	$ 6,578
Jersey City [Member]
Assets Held-for-sale, Not Part of Disposal Group, Total	1,500		$ 1,500
Proceeds from Sale of Buildings	1,800
Gain (Loss) on Sale of Properties	$ 1,600

X

- Definition

Amount of assets held-for-sale that are not part of a disposal group.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI https://asc.fasb.org/extlink&oid=126982154&loc=d3e400-110220

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X

- 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

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X

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
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X

- Definition

The cash inflow from sale of buildings.

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