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Joint Venture - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Apr. 07, 2016
Mar. 31, 2016
Apr. 02, 2015
Jun. 30, 2016
Jun. 30, 2016
Investment [Line Items]          
Additional Contribution to Joint Venture       $ 75,000 $ 461,000
Voting interest in joint venture         50.00%
Gain or loss recorded on initial consolidation of Joint Venture         $ 0
IRU [Member]          
Investment [Line Items]          
Contribution to Joint Venture     $ 1,844,000    
Cash Contribution to Joint Venture     250,000    
Quintillion Holdings, LLC [Member]          
Investment [Line Items]          
Term of indefeasible right of use         30 years
Sale price of fiber strands       5,300,000 $ 5,300,000
Payment received in connection with sale of 46 fiber strands from the Fiber Optic System at closing date   $ 2,650,000      
Additional Contribution to Joint Venture       $ 75,000  
Quintillion Holdings, LLC [Member] | IRU [Member]          
Investment [Line Items]          
Contribution to Joint Venture     922,000    
Cash Contribution to Joint Venture     250,000    
ACS [Member] | IRU [Member]          
Investment [Line Items]          
Contribution to Joint Venture     922,000    
Additional Contribution to Joint Venture     $ 461,000    
Fiber Optic Network [Member]          
Investment [Line Items]          
Purchase price of fiber strand optic cable         $ 11,000,000
Purchase price paid at closing $ 5,500,000        
Term of fibers indefeasible right of use sold to CPAI         The Company, through its wholly-owned subsidiary ACS Cable Systems, LLC, acquired from CPAI a fiber optic cable (including conduit, licenses, permits and right-of-ways) running from the Kuparuk Operating Center to the Trans-Alaska Pipeline System Pump Station #1 (the "Fiber Optic System").
Term of indefeasible right of use         30 years
Sale price of indefeasible right of use of fibers to CPAI         $ 400,000
ACS Cable Systems LLC and Quintillion Holdings, LLC Joint Venture [Member]          
Investment [Line Items]          
Voting interest in joint venture     50.00%   50.00%
ACS Cable Systems LLC and Quintillion Holdings, LLC Joint Venture [Member] | Quintillion Holdings, LLC [Member]          
Investment [Line Items]          
Voting interest in joint venture     50.00%