Equity Awards and Warrants (Tables)

6 Months Ended

Nov. 30, 2021

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Option and Warrant Activity

				Weighted
				average
		Weighted		remaining	Aggregate
	Number of	average		contractual	intrinsic
(in thousands, except per share data)	shares	exercise price		life in years	value
Options and warrants outstanding May 31, 2021	61,573	$	0.95	4.40	$	68,756
Granted	20,151	$	1.97	—		—
Exercised	(5,654)	$	0.71	—		—
Forfeited or expired and cancelled	(6,443)	$	0.83	—		—
Options and warrants outstanding November 30, 2021	69,627	$	1.05	4.61	$	31,184
Outstanding exercisable November 30, 2021	59,807	$	0.87	3.51	$	30,747