Note 6 - Common Stock and Warrants of ROIC (Details) (USD $)
0 Months Ended 3 Months Ended 0 Months Ended
Jun. 23, 2011
Mar. 31, 2015
Mar. 31, 2014
Oct. 23, 2014
Sep. 19, 2014
Dec. 31, 2014
Jul. 31, 2013
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Common Stock, Par or Stated Value Per Share (in Dollars per share)   $ 0.0001       $ 0.0001  
Proceeds from Issuance of Common Stock (in Dollars)   $ 9,936,000          
Payments of Stock Issuance Costs (in Dollars)   171,000          
Number of Days Notice 30 days            
Proceeds from Warrant Exercises (in Dollars)     (7,797,000)        
Stock Repurchase Program, Authorized Amount (in Dollars)             50,000,000
Stock Repurchased During Period, Shares   0          
Private Placement Warrants [Member]              
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Warrants Purchased By Sponsor During IPO 8,000,000            
Warrants, Sales Price Per Warrant (in Dollars per share) 1.00            
Public Warrants [Member]              
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Warrants, Repurchase Price Per Warrant (in Dollars per share) 0.01            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) 12.00            
Class Of Warrant Or Right Number Of Warrants Exercised     639,384        
Proceeds from Warrant Exercises (in Dollars)     7,700,000        
Class of Warrant or Right, Cancelled During Period       64,452      
Public and Private Placement Warrants [Member]              
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Common Stock, Capital Shares Reserved for Future Issuance 53,400,000            
2014 Sales Agreements ATM Program [Member]              
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Number of Sales Agreements Entered Into         4    
Common Stock, Par or Stated Value Per Share (in Dollars per share)         $ 0.0001    
Common Shares That May be Sold Under a Sales Agreement Aggregate Offering Price, Maximum         100,000,000    
Stock Issued During Period, Shares, New Issues   544,567          
Proceeds from Issuance of Common Stock (in Dollars)   9,900,000          
Payments of Stock Issuance Costs (in Dollars)   $ 149,000          
Minimum Price Company's Common Stock Must Trade Before Warrants Issued in The IPO Can Be Redeemed [Member]              
Note 6 - Common Stock and Warrants of ROIC (Details) [Line Items]              
Share Price (in Dollars per share) 18.75