Leasehold Improvements and Equipment (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Property, Plant and Equipment [Line Items]    
Cost $ 17,791,410 $ 17,416,773
Accumulated Depreciation 14,215,074 13,610,392
Net Book Value 3,576,336 3,806,381
Equipment
   
Property, Plant and Equipment [Line Items]    
Cost 1,105,402 1,093,531
Accumulated Depreciation 994,628 952,623
Net Book Value 110,774 140,908
Leasehold improvements
   
Property, Plant and Equipment [Line Items]    
Cost 175,819 175,819
Accumulated Depreciation 125,372 117,268
Net Book Value 50,447 58,551
Components held for future monitoring equipment builds
   
Property, Plant and Equipment [Line Items]    
Cost 210,000 210,000
Accumulated Depreciation      
Net Book Value 210,000 210,000
Software development costs
   
Property, Plant and Equipment [Line Items]    
Cost 726,049 726,049
Accumulated Depreciation 308,825 236,227
Net Book Value 417,224 489,822
Monitoring equipment
   
Property, Plant and Equipment [Line Items]    
Cost 15,574,140 15,211,374
Accumulated Depreciation 12,786,249 12,304,274
Net Book Value $ 2,787,891 $ 2,907,100