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v3.20.1

Selected Statements of Operations Data (Details 1) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total revenues | 83.00% | 81.00% | 78.00%
Customer A [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total revenues | 41.00% | 48.00% | 66.00%
Customer B [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total revenues | 20.00% | 18.00% | 12.00%
Customer C [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total revenues | 22.00% |  |
Customer D [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total revenues |  | 15.00% |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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