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Product Warranty (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
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Mar. 31, 2019 | Dec. 31, 2018
Product Warranty (Textual) [Abstract] |  |
Accrued product warranty costs | $ 2,021 | $ 1,916
Minimum |  |
Product Warranty (Textual) [Abstract] |  |
Limited warranty period on product | 1 year |
Maximum |  |
Product Warranty (Textual) [Abstract] |  |
Limited warranty period on product | 2 years |

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- Definition Limited product warranty period. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c)(5) -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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