Revenue

3 Months Ended

Mar. 31, 2021

Revenue [Abstract]

Revenue

7. Revenue

Disaggregation of Revenue - The disaggregation of revenue is based on geographical region. The following table presents revenue from contracts with customers for the three months ended March 31, 2021 and 2020 (in thousands):

	Three Months Ended March 31, 2021						Three Months Ended March 31, 2020
	United States		International		Total		United States		International		Total
Product	$	41	$	212	$	253	$	34	$	41	$	75
Accessories and parts		1,689		136		1,825		63		-		63
License fees and other		33		5		38		1		10		11
	$	1,763	$	353	$	2,116	$	98	$	51	$	149

Contract liabilities - As of March 31, 2021 and December 31, 2020, the Company has contract liabilities from contracts with customers as follows (in thousands):

	March 31, 2021			December 31, 2020
Service agreements	$	63		$	69
Deposit on future equipment purchases		125			-
Total contract liabilities		188			69
Less: current portion		(32	)		(32	)
Non-current contract liabilities	$	156		$	37

During the three months ended March 31, 2021 and 2020, the Company recognized revenue related to these contract liabilities of $8 thousand and $22 thousand, respectively, that were in the beginning contract liability balances for each of those periods.