Long-Term debt (Details Narrative) $ in Thousands	3 Months Ended			9 Months Ended		38 Months Ended	48 Months Ended
	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Aug. 07, 2022	Jul. 24, 2015 USD ($)	Jan. 30, 2015 USD ($)	Aug. 07, 2014 USD ($)
Mortgage interest description		5.6% to 7.9% mortgage notes due in installments through 2027		5.6% to 7.9% mortgage notes due in installments through 2027
Capitalized interest	$ 210		$ 382	$ 812	$ 864
RiverFront construction loan	60,881	$ 0		60,881		$ 60,881
RiverFront EB5 secondary financing	$ 17,000	$ 0		$ 17,000		$ 17,000
First Tennessee bank Term Loan
Credit Agreement term years	10			10		10
Term loan facility	$ 20,000			$ 20,000		$ 20,000
Dock 79 Construction loan
RiverFront construction loan										$ 65,000
Interest rate over LIBOR										2.35%
Extension term description						one extension period of four years
Debt service ratio							debt service ratio of not less than 1.25 to 1.00 during the Extension Term
Dock 79 EB5 Financing
RiverFront EB5 secondary financing										$ 17,000
Interest rate to year five										4.95%
Interest rate greater than five years										8.00%
Extension term description						additional twelve months
Repay or Redeem						Dock 79 is required to repay or redeem EB5's membership interest for a purchase price equal to the sum of the balance of the EB5's contribution account, plus any accrued by unpaid investment return sixty months after the initial capital contribution, unless extended for an additional twelve months in accordance with the agreement.
Wells Fargo Bank, N.A.
Credit Agreement term years									5
Revolving Credit Agreement									$ 20,000
Sublimit for standby letters of credit									$ 10,000
Letters of credit issued	2,266			2,266		$ 2,266
Borrowed under the revolver	5,687			5,687		5,687
Available for borrowing	12,047			12,047		12,047
Tangible net worth covenant	110,000			110,000		110,000
Available to pay dividends or repurchase stock	77,500			$ 77,500		77,500
Revolver interest over LIBOR				1.4%
Commitment fee				0.15%
Compliance with Covenants				all
First Tennessee Bank
Credit Agreement term years								5
Revolving Credit Agreement								$ 20,000
Revolver conversion to term loan				24 month window to convert up to the full amount of the facility into a ten year term loan
Borrowed under the revolver	753			$ 753		753
Available for borrowing	$ 19,247			$ 19,247		$ 19,247
Revolver interest over LIBOR				1.9%
Commitment fee				0.10%