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Note 6 - Property and Equipment (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 | Aug. 31, 2018 | Oct. 30, 2016 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation | $ 900 |  |  | $ 900 |  | $ 900 | $ 500 |
Property, Plant and Equipment, Net, Ending Balance | 103,447 |  |  | 103,447 |  | 103,447 | 78,756 |
Proceeds from Sale of Property, Plant, and Equipment, Total |  |  |  |  |  | 141 | 146 | $ 33
Gain (Loss) on Disposition of Property Plant Equipment, Total |  |  |  |  |  | (222) | 51 | $ (19)
Monterrey, Mexico Facility [Member] |  |  |  |  |  |  |  |
Proceeds from Sale of Property, Plant, and Equipment, Total | 2,700 |  |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment, Total | 200 |  |  | 200 |  |  |  |
Property in Houston, Texas [Member] |  |  |  |  |  |  |  |
Proceeds from Sale of Property, Plant, and Equipment, Total |  | $ 5,800 |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment, Total |  | $ 2,800 |  |  | $ 2,800 |  |  |
Denver Facility [Member] |  |  |  |  |  |  |  |
Proceeds from Sale of Property, Plant, and Equipment, Total |  |  | $ 13,900 |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment, Total |  |  | $ 7,900 |  |  |  |  |
MEXICO |  |  |  |  |  |  |  |
Property, Plant and Equipment, Net, Ending Balance | $ 21,600 |  |  | $ 21,600 |  | $ 21,600 | $ 3,800 |

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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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