Note 7 - Mortgage Notes Payable (Details Textual) $ in Millions	Mar. 31, 2022 USD ($)
The 300 N.P [Member] \| Mortgage Note, Due June 11, 2022 [Member]
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 2.2
Model Home [Member] \| Mortgage Notes [Member] \| Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Model Home [Member] \| Mortgage Notes [Member] \| Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.63%

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant