Quarterly report pursuant to Section 13 or 15(d)

Revenue - Transaction Price Allocation and Contract Balances (Details)

v3.19.1
Revenue - Transaction Price Allocation and Contract Balances (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Revenue    
Original expected duration true  
Receivables from contracts with customers $ 365 $ 475