Quarterly report pursuant to Section 13 or 15(d)

Significant accounting policies (Revenue recognition and accounts receivable) (Details)

v3.5.0.2
Significant accounting policies (Revenue recognition and accounts receivable) (Details) - Net Sales [Member] - Customer Concentration [Member]
6 Months Ended
Jun. 30, 2015
Concentration Risk [Line Items]  
Number of customers 3
Customer One [Member]  
Concentration Risk [Line Items]  
Risk percentage 58.00%
Customer Two [Member]  
Concentration Risk [Line Items]  
Risk percentage 28.00%
Customer Three [Member]  
Concentration Risk [Line Items]  
Risk percentage 14.00%