3. REVENUE (Tables)

3 Months Ended

Aug. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

    The Company’s revenues by product category are as follows (in thousands): 

	Three Months Ended
	August 31,
	2020		2019
Type of good / service:
Systems	$	801	$	2,934
Contactors		627		1,650
Services		584		949
	$	2,012	$	5,533
Product lines:
Wafer-level	$	1,559	$	4,826
Test During Burn-In		453		707
	$	2,012	$	5,533

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended
	August 31,
	2020		2019
Geographic region:
United States	$	1,041	$	5,057
Asia		969		338
Europe		2		138
	$	2,012	$	5,533

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at a point in time when control transfers to the customers. The following presents revenue based on timing of recognition (in thousands):

	Three Months Ended
	August 31,
	2020		2019
Timing of revenue recognition:
Products and services transferred at a point in time	$	1,570	$	4,859
Services transferred over time		442		674
	$	2,012	$	5,533