CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (loss)	Accumulated Deficit
Balance, shares at May. 31, 2021		23,725
Balance, amount at May. 31, 2021	$ 11,449	$ 237	$ 87,553	$ (28)	$ (76,313)
Issuance of common stock under employee plans, shares		1,461
Issuance of common stock under employee plans, amount	3,003	$ 14	2,989	0	0
Shares repurchased for tax withholdings on vesting of restricted stock units, shares		(48)
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	(259)	$ 0	(259)	0	0
Proceeds from public offerings, net of issuance costs, shares		1,697
Proceeds from public offerings, net of issuance costs, amount	24,030	$ 17	24,013	0	0
Stock-based compensation	1,306	0	1,306	0	0
Net income	1,413	0	0	0	1,413
Foreign currency translation adjustment	(80)	$ 0	0	(80)	0
Balance, shares at Nov. 30, 2021		26,835
Balance, amount at Nov. 30, 2021	40,862	$ 268	115,602	(108)	(74,900)
Balance, shares at Aug. 31, 2021		24,483
Balance, amount at Aug. 31, 2021	14,232	$ 245	89,668	(64)	(75,617)
Issuance of common stock under employee plans, shares		663
Issuance of common stock under employee plans, amount	1,366	$ 6	1,360	0	0
Shares repurchased for tax withholdings on vesting of restricted stock units, shares		(8)
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	(157)	$ 0	(157)	0	0
Proceeds from public offerings, net of issuance costs, shares		1,697
Proceeds from public offerings, net of issuance costs, amount	24,030	$ 17	24,013	0	0
Stock-based compensation	718	0	718	0	0
Net income	717	0	0	0	717
Foreign currency translation adjustment	(44)	$ 0	0	(44)	0
Balance, shares at Nov. 30, 2021		26,835
Balance, amount at Nov. 30, 2021	40,862	$ 268	115,602	(108)	(74,900)
Balance, shares at May. 31, 2022		27,120
Balance, amount at May. 31, 2022	50,989	$ 271	117,686	(105)	(66,863)
Issuance of common stock under employee plans, shares		761
Issuance of common stock under employee plans, amount	1,112	$ 7	1,105	0	0
Shares repurchased for tax withholdings on vesting of restricted stock units, shares		(149)
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	(1,216)	$ (1)	(1,215)	0	0
Stock-based compensation	1,518	0	1,518	0	0
Net income	4,314	0	0	0	4,314
Foreign currency translation adjustment	(44)	0	0	(44)	0
Net unrealized loss on investments	(6)	$ 0	0	(6)	0
Balance, shares at Nov. 30, 2022		27,732
Balance, amount at Nov. 30, 2022	56,667	$ 277	119,094	(155)	(62,549)
Balance, shares at Aug. 31, 2022		27,395
Balance, amount at Aug. 31, 2022	51,518	$ 274	117,668	(150)	(66,274)
Issuance of common stock under employee plans, shares		339
Issuance of common stock under employee plans, amount	657	$ 3	654	0	0
Shares repurchased for tax withholdings on vesting of restricted stock units, shares		(2)
Shares repurchased for tax withholdings on vesting of restricted stock units, amount	(37)	$ 0	(37)	0	0
Stock-based compensation	809	0	809	0	0
Net income	3,725	0	0	0	3,725
Foreign currency translation adjustment	1	0	0	1	0
Net unrealized loss on investments	(6)	$ 0	0	(6)	0
Balance, shares at Nov. 30, 2022		27,732
Balance, amount at Nov. 30, 2022	$ 56,667	$ 277	$ 119,094	$ (155)	$ (62,549)