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Selected Statements of Operations Data (Details Textual) - item	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Selected Statements of Operations Data (Textual)
Number of reportable segments	1
Percent of total revenues, major customer	90.00%	98.00%	93.00%
United States [Member] | Revenues [Member]
Selected Statements of Operations Data (Textual)
Number of customers	2	2
Percent of total revenues, major customer	66.00%	62.00%
Philippines [Member] | Revenues [Member]
Selected Statements of Operations Data (Textual)
Number of customers	2	2	2
Percent of total revenues, major customer	12.00%	17.00%	43.00%
Brazil [Member] | Revenues [Member]
Selected Statements of Operations Data (Textual)
Number of customers			2
Percent of total revenues, major customer			14.00%

X

- Definition

Number of customers whose purchases, as a percent of total revenues, exceeded the threshold.

+ References

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+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
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-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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