For the three months ended March 31, 2022, revenues from two distributors accounted for approximately 25% and 14% of revenues with no other single customer accounting for more than 10% of total revenues. For the three months ended March 31, 2021, revenues from three distributors accounted for approximately 28%, 22% and 10% of revenues with no other single customer accounting for more than 10% of total revenues.

At March 31, 2022, accounts receivable from two distributors accounted for 50% and 13% of accounts receivable with no other single customer accounting for more than 10% of the accounts receivable balance. Accounts receivable from three distributors accounted for 48%, 16% and 15% of net accounts receivable at December 31, 2021.

The following table summarizes revenues by geographic region. Revenues are attributed to countries based on customer’s delivery location.

	For the Three Months
	Ended March 31,
	2022		2021
Americas	$	1,194	$	626
Europe, Middle East and Africa		174		877
Asia Pacific		231		39
	$	1,599	$	1,542