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Note 8 - Fair Value of Financial Instruments (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Apr. 27, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Proceeds from Derivative Instrument, Investing Activities					$ 385,000
Tribeca House Instrument [Member]
Proceeds from Derivative Instrument, Investing Activities	$ 385,000
Interest Rate Cap 1 [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Gain (Loss) on Derivative, Net, Total		$ 0	$ (10,000)	0	(237,000)
Interest Rate Cap 2 [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Gain (Loss) on Derivative, Net, Total		$ 2,000	$ 6,000	$ 24,000	$ (63,000)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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X

- Definition

The cash inflow provided by derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

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