Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Contract Balances (Details)

v3.8.0.1
Revenue Recognition - Contract Balances (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]    
Trade receivables, net $ 12,300 $ 12,645
Contract assets, net - current portion 13,543 14,197
Contract assets, net - long-term portion 11,101 10,377
Deferred revenue $ 13,477 $ 13,871