Goodwill and intangible assets (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets, Future Amortization Expense [Line Items]
2014	$ 186
2015	742
2016	739
2017	424
2018	390
Thereafter	255
Total	2,736	2,423
Trademarks [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Line Items]
2014	0
2015	2
2016	0
2017	0
2018	0
Thereafter	0
Total	2
Intellectual Property [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Line Items]
2014	96
2015	382
2016	382
2017	382
2018	382
Thereafter	255
Total	1,879
Software And Website Development [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Line Items]
2014	79
2015	316
2016	315
2017	0
2018	0
Thereafter	0
Total	710
Customer Lists [Member]
Finite-Lived Intangible Assets, Future Amortization Expense [Line Items]
2014	11
2015	42
2016	42
2017	42
2018	8
Thereafter	0
Total	$ 145