Note 9 - Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Apr. 27, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Proceeds from Derivative Instrument, Investing Activities		$ 356
Tribeca House Instrument [Member]
Proceeds from Derivative Instrument, Investing Activities	$ 385
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Gain (Loss) on Derivative, Net, Total		(208)	261	$ (139)
Interest Rate Cap 2 [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Gain (Loss) on Derivative, Net, Total		$ 10	$ 99