XML 70 R33.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Goodwill and Other Intangible Assets, Net - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]      
Goodwill $ 2,042,000 $ 2,042,000  
Goodwill impairment 0 0 $ 0
Amortization expense for acquired identifiable intangible assets $ 300,000 $ 300,000 $ 300,000