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Note 1 - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details) | 12 Months Ended
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Dec. 31, 2018
Leasehold Improvements [Member] |
Assets, estimated useful life | Shorter of useful lives or the terms of the leases
Minimum [Member] | Building [Member] |
Assets, estimated useful life (Year) | 15 years
Minimum [Member] | Building Improvements [Member] |
Assets, estimated useful life (Year) | 5 years
Minimum [Member] | Furniture Fixtures and Equipment [Member] |
Assets, estimated useful life (Year) | 3 years
Maximum [Member] | Building [Member] |
Assets, estimated useful life (Year) | 45 years
Maximum [Member] | Building Improvements [Member] |
Assets, estimated useful life (Year) | 20 years
Maximum [Member] | Furniture Fixtures and Equipment [Member] |
Assets, estimated useful life (Year) | 25 years

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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 + Details
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Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
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Period Type: |

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- Details
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- Details
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- Details
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- Details
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- Details
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