Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

Revenue Recognition [Abstract]

Summary of revenue performance obligations

The following is a summary of our revenue performance obligations:

	Three Months Ended September 30, 2021				Three Months Ended September 30, 2020
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	585	2.1	%	$	546	2.6	%
Revenue recognized at a point in time		27,177	97.9	%		20,274	97.4	%
	$	27,762	100.0	%	$	20,820	100.0	%

	Nine Months Ended September 30, 2021				Nine Months Ended September 30, 2020
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	1,683	2.4	%	$	1,101	2.1	%
Revenue recognized at a point in time		69,015	97.6	%		52,144	97.9	%
	$	70,698	100.0	%	$	53,245	100.0	%

Summary of contract assets and contract liabilities

The following summarizes our contract assets and contract liabilities:    

(In thousands)	September 30, 2021		December 31, 2020
Contract assets, included in other current assets	$	22	$	2
Contract liabilities - advance customer payments	$	453	$	567
Contract liabilities - deferred warranty revenue	$	413	$	344

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)	2021		2020		2021		2020
Amounts reclassified from beginning contract liabilities to revenue	$	257	$	287	$	347	$	106
Amounts reclassified from deferred warranty revenue		120		86		225		269
Total	$	377	$	373	$	572	$	375