Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Revenue Recognized in Period

The following table presents additional revenue and contract disclosures (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Revenue recognized in the period from:
Amounts included in deferred revenue at the beginning of the period	$	1,642	$	1,369	$	1,995	$	1,605
Performance obligations satisfied in previous periods (true ups)	54		—		54		—

Schedule of Remaining Performance Obligations

The Company's remaining revenue under contracts with performance obligations was as follows (in thousands):

	As of
	June 30, 2018		December 31, 2017
Revenue from contracts with performance obligations expected to be satisfied in:
One year or less	$	6,373	$	2,440
More than one year but less than two years	437		149
More than two years	118		240
Total	$	6,928	$	2,829