Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($)	9 Months Ended
Feb. 28, 2019	Feb. 28, 2018
Cash flows from operating activities
Net loss	$ (6,669,796)	$ (5,251,793)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities
Non-cash revenue received as available for sale securities	(395,023)	(611,657)
Investment loss (gain) on marketable securities	(1,612,559)	0
Unrealized loss (gain) on equity securities	(18,814)	0
Unrealized loss on cryptocurrencies	36,724	0
Stock compensation expenses	882,273	724,220
Depreciation and amortization	46,407	34,024
Changes in operating assets and liabilities
Accounts receivable	(9,270)	(16,734)
Inventory	(23,937)	(110,802)
Other current assets	(655,224)	(224,995)
Accounts payable	(109,053)	(109,798)
Accrued interest	135,485	(18,000)
Deferred revenue	(104,118)	319,311
Customer deposit	97,421	3,008
Other accrued liabilities	740	99,109
Net cash (used in) operating activities	(8,398,744)	(5,164,107)
Cash flows from investing activities
Purchase of equipment	(139,241)	(206,016)
Sale of investments	75,000	0
Proceeds from sale of marketable securities	2,313,734	0
Net cash provided by (used in) investing activities	2,249,493	(206,016)
Cash flows from financing activities
Proceeds from issuance of common stock	610,450	0
Proceeds of issuance of preferred stock, series D-2017	3,578,000	5,933,050
Payments made for preferred stock dividends	(393,502)	(306,627)
Investor deposits	0	(210,100)
Repayments of debts	(995,140)	(410,000)
Proceeds of issuance of new debts	4,259,800	995,140
Net cash provided by financing activities	7,059,608	6,001,463
Effects of currency translation on cash and cash equivalents	(12,650)	11,079
Net increase in cash and cash equivalents	897,707	642,419
Cash and cash equivalents - beginning of period	1,390,258	1,770,729
Cash and cash equivalents - end of period	2,287,965	2,413,148
Supplemental cash flow disclosures
Cash paid for interest	59,708	47,217
Cash paid for income taxes	0	0
Supplemental disclosure of non-cash activity
Stock received for investor relations	$ 379,050	$ 1,006,575

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

+ Details

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Period Type:	duration

- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- References

No definition available.

+ Details

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- Definition

The aggregate net change in the difference between the fair value and the carrying value, or in the comparative fair values, of marketable securities categorized as trading held at each balance sheet date, that was included in earnings for the period, which may have arisen from (a) securities classified as trading, (b) the unrealized holding gain (loss) on held-to-maturity securities transferred to the trading security category, and (c) the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) on available-for-sale securities transferred to trading securities during the period and/or any unrealized gains or losses on investments that are separately or otherwise not categorized as trading or available-for-sale.

+ References

No definition available.

+ Details

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