Consolidated Balance Sheets (Unaudited) - USD ($)	Feb. 28, 2018	May 31, 2017
Current Assets:
Cash	$ 334,036	$ 579,021
Accounts receivable - Trade, net of allowance for doubtful accounts of $31,660 at February 28, 2018 and May 31, 2017	3,673,965	6,160,145
Related party receivables	55,080	73,578
Inventory	4,088,774	1,587,552
Prepaid expenses	105,925	136,395
Total Current Assets	8,257,780	8,536,691
Property, Plant and Equipment, net	22,884,618	19,706,782
Deferred Tax Asset		281,415
Total Assets	31,142,398	28,524,888
Current Liabilities:
Current portion of long-term debt	8,240,541	2,493,236
Current portion of capital leases	2,432,198	2,261,560
Accounts payable and accrued expenses	2,850,482	5,727,903
Deferred revenue	4,595,034
Accrued expenses - related parties	26,072	29,076
Preferred dividends payable		29,726
Total Current Liabilities	18,144,327	10,541,501
Deferred Tax Liability	600,685
Long-Term Debt, net of current portion	9,245,283	15,310,754
Capital Leases, net of current portion	1,797,036	1,532,503
Equity:
Preferred stock, $0.0001 par value, cumulative, 20,750,000 shares authorized, 50,000 shares issued and outstanding, liquidation preference of $5,000,000	5	5
Common stock, $0.0001 par value, 5,000,000,000 shares authorized, 28,361,201 shares issued and outstanding	2,836	2,836
Additional paid-in capital	53,790,764	53,790,764
Accumulated deficit	(53,514,174)	(53,724,991)
Total Greystone Stockholders’ Equity	279,431	68,614
Non-controlling interest	1,075,636	1,071,516
Total Equity	1,355,067	1,140,130
Total Liabilities and Equity	$ 31,142,398	$ 28,524,888

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.