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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 2: 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=6927468&loc=d3e6404-108592

Reference 3: 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=7491637&loc=d3e13531-108611

Reference 4: 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=6927468&loc=d3e6351-108592

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Segment Reporting and Geographic Information (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended											12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 segments	Sep. 30, 2012	Sep. 30, 2013 Network Integration [Member]	Sep. 30, 2012 Network Integration [Member]	Sep. 30, 2013 Network Integration [Member]	Sep. 30, 2012 Network Integration [Member]	Sep. 30, 2013 Network Integration [Member] Major Customer, One [Member]	Sep. 30, 2012 Network Integration [Member] Major Customer, One [Member]	Sep. 30, 2013 Network Integration [Member] Major Customer, Two [Member]	Sep. 30, 2012 Network Integration [Member] Major Customer, Two [Member]	Sep. 30, 2013 Network Integration [Member] Customer Concentration Risk [Member] Revenue [Member] Major Customer, One [Member]	Sep. 30, 2012 Network Integration [Member] Customer Concentration Risk [Member] Revenue [Member] Major Customer, One [Member]	Sep. 30, 2013 Network Integration [Member] Customer Concentration Risk [Member] Revenue [Member] Major Customer, Two [Member]	Sep. 30, 2012 Network Integration [Member] Customer Concentration Risk [Member] Revenue [Member] Major Customer, Two [Member]	Sep. 30, 2013 Network Integration [Member] Customer Concentration Risk [Member] Accounts Receivable [Member] Major Customer, One [Member]	Dec. 31, 2012 Network Integration [Member] Customer Concentration Risk [Member] Accounts Receivable [Member] Major Customer, One [Member]	Sep. 30, 2013 Network Integration [Member] Customer Concentration Risk [Member] Accounts Receivable [Member] Major Customer, Two [Member]	Dec. 31, 2012 Network Integration [Member] Customer Concentration Risk [Member] Accounts Receivable [Member] Major Customer, Two [Member]
Segment Reporting Information [Line Items]
Number of Business Segments			2
Revenue	$ 38,385	$ 34,666	$ 115,465	$ 105,707	$ 15,585	$ 13,816	$ 50,701	$ 48,892	$ 32,500	$ 25,600	$ 12,900	$ 11,700
Concentration percentage													28.00%	24.00%	11.00%	11.00%	12.00%	21.00%	16.00%	9.00%