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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
8.
Goodwill and Intangible Assets
 
The Company has recorded goodwill of $18,555,578 as of March 31, 2018. There were no changes in the carrying amount of goodwill during the three month period ended March 31, 2018. The Company considered whether there were indicators of impairment during the three month period ended March 31, 2018.
 
The Company has recorded net intangible assets of $3,510,893, consisting of purchased intangibles and internally developed software used in the conduct of business. For the three month periods ended March 31, 2018, the Company capitalized internally developed software costs of approximately $70,700, related to costs associated with our next generation TDI Optimiser™ application. For the three month period ended March 31, 2018 there were disposals of fully amortized intangible assets of approximately $1,930,000. There were no material disposals of intangible assets during the three month period ended March 31, 2017.
 
The aggregate amortization expense recorded for the three month periods ended March 31, 2018 and 2017 were approximately $262,300 and $269,800, respectively. The total weighted remaining average life of all purchased intangible assets and internally developed software costs was approximately 6.3 years and 2.3 years, respectively, at March 31, 2018.