XML 110 R96.htm IDEA: XBRL DOCUMENT
v3.19.1

Financial instruments (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Recurring |  |  |
Net asset arising from put/call options | [1] | $ 24,000 | $ 280,000
Fair Value, Inputs, Level 1 [Member] |  |  |
Recurring |  |  |
Net asset arising from put/call options |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Recurring |  |  |
Net asset arising from put/call options |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |  |
Recurring |  |  |
Net asset arising from put/call options |  | $ 24,000 | $ 280,000
[1] | The net asset arising from the put/call options is included in other assets in the accompanying consolidated balance sheets as of December 31, 2018 and 2017.

X
- References No definition available. + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |