Note 10 - Fair Value Measurement (Details Textual) - USD ($) |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
Dec. 31, 2017 |
|
| Asset Impairment Charges, Total | $ 2,345,000 | $ 2,978,000 | |
| Real Estate Owned, Amount of Loss at Acquisition | 254,000 | $ 30,000 | |
| SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure | $ 175,000 | $ 0 | |
| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of reduction to fair value of loan related to real estate owned (REO) at time of acquisition. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|