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Preferred Stock of ROIC	12 Months Ended
Preferred Stock of ROIC	Dec. 31, 2018
Equity [Abstract]
Preferred Stock of ROIC	Preferred Stock of ROIC The Company is authorized to issue 50,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the board of directors. As of December 31, 2018 and 2017, there were no shares of preferred stock outstanding.