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3. Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid expenses and other current assets
   December 31, 
   2013   2012 
Site equipment to be installed  $1,069,000   $77,000 
Deposits   413,000    437,000 
Prepaid expenses   340,000    384,000 
Total  $1,822,000   $898,000