Quarterly report pursuant to Section 13 or 15(d)

Revenue Contract Acquisition Costs (Details)

v3.10.0.1
Revenue Contract Acquisition Costs (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Capitalized Contract Cost [Line Items]          
Capitalized contract cost, amortization $ 505,000 $ 387,000 $ 731,000 $ 788,000  
Deferred Commissions          
Capitalized Contract Cost [Line Items]          
Capitalized contract costs, current 326,000   326,000   $ 308,000
Capitalized contract costs, noncurrent $ 46,000   $ 46,000   $ 47,000