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Acquisition (Details Textual) (USD $)
0 Months Ended 12 Months Ended
Dec. 20, 2012
Apr. 02, 2012
Dec. 31, 2012
Acquisition (Textual) [Abstract]      
Date of acquisition agreement   Mar. 15, 2012  
Acquisition effective date   Apr. 02, 2012 Apr. 02, 2012
Percentage of outstanding shares acquired 5.00% 95.00%  
Cost of outstanding shares acquired   $ 19,694,000 $ 19,694,000
Net cash acquired in acquisition   16,400,000  
Payments to acquire remaining noncontrolling interest     931,000
Resulting ownership percentage in PhaseLink     100.00%
Acquisition costs expensed as incurred     205,000
Decrease to goodwill     (12,000)
Increase to accounts receivable     44,000
Increase to other liabilities     22,000
Decrease to fixed assets     $ (10,000)
Minimum [Member]
     
Acquisition (Textual) [Abstract]      
Identifiable intangible assets estimated useful life     2 years
Maximum [Member]
     
Acquisition (Textual) [Abstract]      
Identifiable intangible assets estimated useful life     5 years
Non-competition agreements [Member]
     
Acquisition (Textual) [Abstract]      
Identifiable intangible assets estimated useful life     2 years
Developed Technology and Customer Relationship [Member]
     
Acquisition (Textual) [Abstract]      
Identifiable intangible assets estimated useful life     10 years