Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Revenue Recognition - Schedule of Deferred Revenue (Details) (Parenthetical) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenue from Contract with Customer [Abstract]        
Revenue recognized $ 6,891,000 $ 2,643,000 $ 6,238,000 $ 3,738,000