Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Goodwill - Additional Information (Detail)

v3.19.2
Intangible Assets and Goodwill - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]          
Intangible assets and goodwill impairment     $ 0    
Goodwill $ 2,926,000   2,926,000   $ 2,926,000
Amortization expense $ 0 $ 0 $ 0 $ 0