XML 33 R21.htm IDEA: XBRL DOCUMENT v3.10.0.1
Selling Arrangement (Tables)
12 Months Ended
Dec. 31, 2018
Selling Arrangement  
Summary of the Carrying Amount of the Selling Arrangement
    2018     2017  
Gross cost   $ 4,000,000     $ 4,000,000  
Accumulated amortization     (3,083,000 )     (2,683,000 )
Net carrying amount   $ 917,000     $ 1,317,000