Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Cash flows relating to operating activities
Net income (loss)	$ 249,629	$ (4,635,607)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Bargain purchase gain	0	(1,187,235)
Forgiveness of Paycheck Protection Program loan	(2,059,826)	0
Depreciation and amortization	401,448	307,732
Gain on sale of property and equipment	(4,598,095)
Stock-based compensation	95,016	163,493
Deferred income taxes	0	(406,304)
Non-cash lease costs	92,042	596,188
Increase (decrease) in:
Accounts receivable, net	217,836	(381,945)
Inventories, net	(638,534)	(313,012)
Prepaid expenses	167,478	(39,253)
Deposits on capital improvements to factory	0	(417,794)
Rent, utility deposits and ERP deposits	(397,193)	(173,294)
Accounts payable	(27,776)	476,589
Accrued liabilities and customer deposits	(409,187)	352,537
Net cash used in operating activities	(6,907,162)	(5,657,905)
Cash flows relating to investing activities
Acquisition of Ample Hills	0	(1,713,404)
Purchases of property and equipment	(188,687)	(510,321)
Proceeds from the sale of property and equipment	4,797,924	35,500
Net cash provided by (used in) investing activities	4,609,237	(2,188,225)
Cash flows relating to financing activities
Proceeds from Paycheck Protection Program, net of repayment	264,476	1,795,080
Payments on short-term borrowing	0	(48,625)
Repurchase of common stock	0	(300,492)
Net cash provided by financing activities	264,476	1,445,963
Decrease in cash and cash equivalents	(2,033,449)	(6,400,167)
Cash and cash equivalents, beginning of period	4,032,690	10,566,531
Cash and cash equivalents, end of period	1,999,241	4,166,364
Supplemental disclosure of cash flow information
Cash paid for income taxes, net of refunds	19,200	80,600
Cash paid for interest	$ 63	$ 616