21. SELECTED QUARTERLY CONSOLIDATED FINANCIAL DATA (Tables)

12 Months Ended

May 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Selected quarterly consolidated financial data (unaudited)

The following tables (presented in thousands, except per share data) sets forth selected unaudited condensed consolidated statements of operations data for each of the four quarters of the fiscal years ended May 31, 2021 and 2020.

	Three Months Ended
	Aug. 31,		Nov. 30,			Feb. 28,			May 31,
	2020		2020			2021			2021
Net sales	$	2,012	$	1,683		$	5,267		$	7,638
Gross profit	$	227	$	377		$	1,894		$	3,534
Net income (loss)	$	107	$	(1,966	)	$	(735	)	$	567
Net income (loss) per share basic and diluted	$	0.00	$	(0.08	)	$	(0.03	)	$	0.02

	Three Months Ended
	Aug. 31,			Nov. 30,		Feb. 29,		May 31,
	2019			2019		2020		2020
Net sales	$	5,533		$	6,874	$	6,111	$	3,773
Gross profit (loss)	$	2,271		$	3,202	$	2,991	$	(93	)
Net (loss) income	$	(413	)	$	251	$	245	$	(2,885	)
Net (loss) income per share basic and diluted	$	(0.02	)	$	0.01	$	0.01	$	(0.13	)