Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2019

Revenue Recognition [Abstract]

Summary of revenue performance obligations

The following is a summary of our revenue performance obligations in the three and nine months ended September 30, 2019 and the three and nine months ended September 30, 2018:

	Three Months Ended September 30, 2019				Three Months Ended September 30, 2018
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	403	3	%	$	1,241	7	%
Revenue recognized at a point in time		11,988	97	%		15,442	93	%
	$	12,391	100	%	$	16,683	100	%

	Nine Months Ended September 30, 2019				Nine Months Ended September 30, 2018
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	1,041	2	%	$	3,262	7	%
Revenue recognized at a point in time		41,370	98	%		43,395	93	%
	$	42,411	100	%	$	46,657	100	%

Summary of contract assets and contract liabilities

The following summarizes our contract assets and contract liabilities:    

(In thousands)	September 30, 2019		December 31, 2018
Contract assets, included in other current assets	$	6	$	—
Contract liabilities - advance customer payments	$	427	$	366
Contract liabilities - deferred warranty revenue	$	235	$	218

Summary of the amounts reclassified from beginning contract liabilities to revenue

The following summarizes the amounts reclassified from beginning contract liabilities to revenue:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2019		2018			2019		2018
Amounts reclassified from beginning contract liabilities to revenue	$	342	$	39	$	401	$	262
Amounts reclassified from deferred warranty revenue		111		99	334		310
Total	$	453	$	138	$	735	$	572