Revenue and Deferred Revenue (Tables)

6 Months Ended

Jun. 30, 2023

Revenue and Deferred Revenue

Summary of deferred revenue

	June 30, 2023
Deferred revenue - short term	$	2,444
Revenue recognized in the six-months ended related to amounts included in deferred revenue as of January 1, 2023	$	1,055

Summary of revenue by timing of recognition

	Three-Months Ended June 30,
	2023						2022
	Point in time		Over time		Total		Point in time		Over time		Total
ASRs	$	20	$	1,080	$	1,100	$	31	$	1,011	$	1,042
Blue Light Towers, E-Phones and Call Boxes		2,393		70		2,463		—		—		—
Total	$	2,413	$	1,150	$	3,563	$	31	$	1,011	$	1,042

	Six-Months Ended June 30,
	2023						2022
	Point in time		Over time		Total		Point in time		Over time		Total
ASRs	$	40	$	2,082	$	2,122	$	46	$	1,939	$	1,985
Blue Light Towers, E-Phones and Call Boxes		4,180		158		4,338		—		—		—
Total	$	4,220	$	2,240	$	6,460	$	46	$	1,939	$	1,985