|
Income taxes (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2013
|
|
| Income taxes [Abstract] | |
| Net operating loss carry forwards | $ 80 |
| Expiration | Dec. 31, 2033 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|