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Business Segments, Concentration of Credit Risk and Significant Customers - Significant Customers (Details) - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Customer A
Significant Customers
Percentage of concentration risk	41.00%	36.00%	47.00%	27.00%
Customer B
Significant Customers
Percentage of concentration risk	25.00%	14.00%	23.00%	12.00%
Customer C
Significant Customers
Percentage of concentration risk	13.00%	32.00%	12.00%	37.00%
Net accounts receivable | Credit concentration | Three customers
Significant Customers
Percentage of concentration risk			81.00%		94.00%
Number of customers	2		2		3

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- Definition

Represents the number of customers on whom the entity relies significantly giving rise to concentration of risk.

+ References

No definition available.

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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

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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=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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