Annual report pursuant to Section 13 and 15(d)

Nature of business and operations (Details)

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Nature of business and operations (Details)
12 Months Ended
Dec. 31, 2015
segment
Sale of Stock By Subsidiary [Line Items]  
Number of Operating Segments 1
Ilios  
Sale of Stock By Subsidiary [Line Items]  
The Company's ownership percentage in subsidiary 65.00%
Restricted stock | Ilios  
Sale of Stock By Subsidiary [Line Items]  
The Company's ownership percentage in subsidiary 64.30%