Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue Recognition [Abstract]

Summary of revenue performance obligations

The following is a summary of our revenue performance obligations:

	Three Months Ended March 31, 2021				Three Months Ended March 31, 2020
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	403	2.3	%	$	193	1.2	%
Revenue recognized at a point in time		17,329	97.7	%		16,236	98.8	%
	$	17,732	100.0	%	$	16,429	100.0	%

Summary of contract assets and contract liabilities

The following summarizes our contract assets and contract liabilities:    

(In thousands)	March 31, 2021		December 31, 2020
Contract assets, included in other current assets	$	24	$	2
Contract liabilities - advance customer payments	$	406	$	567
Contract liabilities - deferred warranty revenue	$	385	$	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 March 31,
(In thousands)	2021		2020
Amounts reclassified from beginning contract liabilities to revenue	$	339	$	76
Amounts reclassified from deferred warranty revenue		90		100
Total	$	429	$	176