XML 36 R25.htm IDEA: XBRL DOCUMENT v3.19.2
Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets

   June 30,   December 31, 
   2019   2018 
Gross carrying amount  $4,910,563   $4,909,318 
Accumulated amortization   (4,684,033)   (4,642,875)
Net carrying amount  $226,530   $266,443