Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Operating activities:
Net loss	$ (549,118)	$ (900,115)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	366	641
Accrued interest income	0	27
Equity in loss of affiliated company	63,411	162,634
Loss on disposal of property and equipment	0	1,276
Deferred Income Taxes	0	(52,156)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(18,467)	72,781
Income taxes payable	1,600	0
Accounts payable, accrued expenses, and other	(29,439)	44,094
Net cash used in operating activities	(531,647)	(670,818)
Investing activities:
Proceeds from sales of marketable securities	0	4,200,000
Purchases of marketable securities	0	(2,700,000)
Purchase of property and equipment	0	(1,465)
Crossflo acquisition liability	177,246	0
Net cash used in investing activities	177,246	1,498,535
Net increase (decrease) in cash, cash equivalents and restricted cash	(354,401)	827,717
Cash, cash equivalents and restricted cash, beginning of period	2,319,449	1,001,084
Cash, cash equivalents and restricted cash, end of period	1,965,048	1,828,801
Supplemental Disclosure of Cash Flow Information:
Cash paid for income taxes	$ 0	$ 2,400