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Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Property, Plant and Equipment [Line Items] |  |  |
Operating lease right-of-use assets | $ 14,995 | $ 13,600 |
Current portion of long-term lease obligations | 7,059 | 6,200 |
Long-term lease obligations | $ 8,030 | $ 7,400 |
Weighted average remaining lease terms | 2 years 9 months 4 days |  |
Operating lease weighted average discount rate | 6.00% |  |
Other current assets |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Restricted cash, current | $ 3,200 |  | $ 3,900
Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Warranty, term | 1 year |  |
Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Warranty, term | 2 years |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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