| Name | RevenueRecognitionRetrospectiveRateSettingSystemsPolicyPolicyTextBlock |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | nonnum:textBlockItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Revenue Recognition, Retrospective Rate-Setting Systems, Policy [Policy Text Block] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Disclosure of accounting policy for revenue recognition of retrospective rate setting systems. This policy discloses differences between the original estimate and subsequent revision of payment rates under the retrospective rate setting method that are included in the Statement of Operations in the period in which the revisions are made and disclosed. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Note | Element is intended to be used in periods before adoption of amendments from Accounting Standards Update 2014-09. Upon effective date of amendments from Accounting Standards Update 2014-09, element will be transitional and intended to be used by entity that has not adopted amendments from Accounting Standards Update 2014-09. | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| PublishDate | 2018-01 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Source | ASU | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| SourceName | Revenue | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Source_ASU_Number | 2014-09 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| TaxonomyVersion | 2018 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2017-08 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |