Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Summary of Reconciliation of Deferred Revenue to Aggregate Revenue Under Contract

The following table reconciles deferred revenue to Aggregate Revenue Under Contract at June 30, 2018 and December 31, 2017, respectively.

	June 30, 2018		December 31, 2017
Deferred revenue (GAAP basis)	$	25,890,000	$	26,534,000
Amounts under non-cancellable contracts for which the Company does not yet have the contractual right to bill at the period end (A)		21,604,000		25,470,000
Aggregate Revenue Under Contract	$	47,494,000	$	52,004,000

(A) Amounts are billable in future periods and represent (i) non-cancellable contracts for subscribers with multi-year subscriptions where the future years are not yet billable, or (ii) subscribers with non-cancellable annual subscriptions with interim billing terms.

Summary of Amortization Expense Related to Net Capitalized Commission Asset

The Company’s future amortization expense related to the net capitalized commission asset balance at June 30, 2018 follows:

For the Year Ended December 31,	Amount
2018 (July 1, 2018 to December 31, 2018)	$	1,021,000
2019		1,259,000
2020		578,000
2021		192,000
2022		6,000
Total	$	3,056,000