Note 6 - Leases - Operating and Finance Lease Assets and Liabilities (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
Dec. 30, 2018 |
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|---|---|---|---|---|---|
| Operating Lease, Right-of-Use Asset | $ 4,904 | $ 5,452 | |||
| Finance lease assets (a) | [1] | 10,716 | |||
| Total leased assets | 15,620 | ||||
| Operating leases | 2,070 | ||||
| Finance leases | 1,485 | 1,547 | |||
| Operating leases | 3,338 | ||||
| Finance leases | $ 9,592 | $ 9,947 | |||
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| X | ||||||||||
- Definition The total right-of-use assets under operating and finance leases. No definition available.
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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