XML 119 R105.htm IDEA: XBRL DOCUMENT v3.8.0.1
Supplemental disclosure of cash flow information (Details Textual) - shares
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Redeemable Preferred Stock [Member]      
Supplemental Disclosure Of Cash Flow Information [Line Items]      
Stock Issued During Period, Shares, Issued for Services 9,441 8,421 8,615
Stock Issued During Period, Shares, Conversion of Convertible Securities 12,214 11,558 7,195
Common Stock [Member]      
Supplemental Disclosure Of Cash Flow Information [Line Items]      
Stock Issued During Period, Shares, Issued for Services 34,991 25,156 10,514