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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%

X

- Definition

Percentage of total revenues.

+ References

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X

- 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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