Debt (Details Narrative) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 19, 2021	Feb. 06, 2019	Nov. 17, 2017
Line of Credit Facility [Line Items]
2022				$ 0
2023				0
2024				0
2025				0
2026 and subsequent years				180,070,000
Outstanding letters of credit				506,000
Principal sum				178,409,000	$ 89,964,000
Debt cost amortization				150,000
Capitalized interest costs				$ 3,783,000	$ 3,762,000
Dock 79 Eagle Bank [Member]
Line of Credit Facility [Line Items]
Loan term			120 months
Principal sum									$ 90,000,000
Fixed interest rate									4.125%
Prepayment penalty		$ 900,000
Dock 79 Loan [Member]
Line of Credit Facility [Line Items]
Principal sum							$ 92,070,000
Fixed interest rate							3.03%
Debt description	Either loan may be prepaid subsequent to April 1, 2024, subject to yield maintenance premiums. Either loan may be transferred to a qualified buyer as part of a one-time sale subject to a 60% loan to value, minimum of 7.5% debt yield and a 0.75% transfer fee
Maren [Member]
Line of Credit Facility [Line Items]
Principal sum							$ 88,000,000
Fixed interest rate							3.03%
Debt description	Either loan may be prepaid subsequent to April 1, 2024, subject to yield maintenance premiums. Either loan may be transferred to a qualified buyer as part of a one-time sale subject to a 60% loan to value, minimum of 7.5% debt yield and a 0.75% transfer fee
Wells Fargo Level I [Member]
Line of Credit Facility [Line Items]
Interest rate spread				1.50%
Commitment fee				0.25%
Wells Fargo Level I I [Member]
Line of Credit Facility [Line Items]
Interest rate spread				1.25%
Commitment fee				0.20%
Wells Fargo Level I I I [Member]
Line of Credit Facility [Line Items]
Interest rate spread				1.00%
Commitment fee				0.15%
Wells Fargo [Member]
Line of Credit Facility [Line Items]
Loan term						5 years
Maximum facility amount								$ 20,000,000
Outstanding revolver				$ 0
Outstanding letters of credit				506,000
Available for borrowing				$ 19,494,000
Letter of credit fee				1.00%
Applicable interest rate				1.10425%
Dividend limit				$ 246,000,000
Covenant compliance				all