Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 764,908	$ 530,282
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	1,085,267	778,911
Deferred tax expense	331,600	203,800
Decrease in trade accounts receivable	479,605	3,731,179
Decrease (increase) in related party receivables	(40,542)	36,828
Decrease (increase) in inventory	19,715	(1,241,534)
Decrease in prepaid expenses	40,462	76,983
Increase (decrease) in accounts payable and accrued liabilities	2,543,462	(2,023,966)
Decrease in deferred revenue	(3,280,500)
Net cash provided by operating activities	1,943,977	2,092,483
Cash Flows from Investing Activities:
Purchase of property and equipment	(1,477,449)	(1,977,498)
Cash Flows from Financing Activities:
Proceeds from long-term debt	1,856,800	1,795,000
Payments on long-term debt and capitalized leases	(1,101,336)	(1,128,686)
Proceeds from revolving loan	1,000,000
Payments on revolving loan	(1,300,000)
Payments on related party notes payable	(61,887)	(56,948)
Dividends paid on preferred stock		(92,398)
Distributions paid by non-controlling interest	(51,000)	(51,000)
Net cash provided by financing activities	342,577	465,968
Net Increase in Cash	809,105	580,953
Cash, beginning of period	379,632	579,021
Cash, end of period	1,188,737	1,159,974
Non-cash Activities:
Acquisition of equipment by capital lease	2,333,333
Capital expenditures in accounts payable	110,182
Preferred dividend accrual	102,945	31,849
Supplemental information:
Interest paid	$ 429,050	$ 295,836