Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2021

Revenue Recognition [Abstract]

Summary of revenue performance obligations

The following is a summary of our revenue performance obligations:

	Three Months Ended June 30, 2021				Three Months Ended June 30, 2020
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	695	2.8	%	$	362	2.3	%
Revenue recognized at a point in time		24,509	97.2	%		15,634	97.7	%
	$	25,204	100.0	%	$	15,996	100.0	%

	Six Months Ended June 30, 2021				Six Months Ended June 30, 2020
(In thousands except percentages)	Revenues		Percent of Revenues		Revenues		Percent of Revenues
Revenue recognized over time	$	1,098	2.6	%	$	555	1.7	%
Revenue recognized at a point in time		41,838	97.4	%		31,870	98.3	%
	$	42,936	100.0	%	$	32,425	100.0	%

Summary of contract assets and contract liabilities

The following summarizes our contract assets and contract liabilities:    

(In thousands)	June 30, 2021		December 31, 2020
Contract assets, included in other current assets	$	18	$	2
Contract liabilities - advance customer payments	$	653	$	567
Contract liabilities - deferred warranty revenue	$	391	$	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 June 30,				Six Months Ended June 30,
(In thousands)	2021		2020		2021		2020
Amounts reclassified from beginning contract liabilities to revenue	$	120	$	55	$	345	$	95
Amounts reclassified from deferred warranty revenue		98		83		161		183
Total	$	218	$	138	$	506	$	278