Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Schedule of Deferred Revenue (Details) (Parenthetical)

v3.19.3
Revenue Recognition - Schedule of Deferred Revenue (Details) (Parenthetical) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue from Contract with Customer [Abstract]        
Revenue recognized $ 9,325,000 $ 2,434,000 $ 9,544,000 $ 3,306,000