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Summary of Percentage of Revenues and A/R from Major Customers (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
TIGroupAutomotiveSystemsMember
Percentage of revenues from major customers	19.00%	21.00%
Percentage of Accounts Receivable balances	22	26
FisherCompanyMember
Percentage of revenues from major customers	12.00%	12.00%
Percentage of Accounts Receivable balances	12	13

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- Definition

Additional information about the entity or its reportable segments that may contribute to an understanding of the enterprise.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 45
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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
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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