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v3.19.1

Segment Reporting and Concentrations (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | $ 7,784 |  | $ 0
Foreign Customer [Member] | Sales Revenue, Net [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 52.00% | 58.00% |
Foreign Customer [Member] | Accounts Receivable [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 62.00% |  | 57.00%
Two clients [Member] | Sales Revenue, Net [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 26.00% | 32.00% |
Three Clients [Member] | Accounts Receivable [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 43.00% |  | 48.00%
Client [Member] | Accounts Receivable [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 10.00% | 10.00% |

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- Definition Amount of lessee's right to use underlying asset under operating lease. + 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 (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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