Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Cash Flows from Operating Activities:
Net income	$ 1,293,283	$ 679,899
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	3,334,730	2,578,842
Deferred tax expense	486,300	882,100
Loss on sale of asset		7,932
Decrease in trade accounts receivable	708,876	2,486,180
Decrease in related party receivables	33,347	18,498
Increase in inventory	(2,062,150)	(2,501,222)
Decrease (increase) in prepaid expenses	(23,931)	30,470
Increase (decrease) in accounts payable and accrued liabilities	1,943,133	(2,778,406)
Increase (decrease) in deferred revenue	(751,827)	4,595,034
Net cash provided by operating activities	4,961,761	5,999,327
Cash Flows from Investing Activities:
Purchase of property and equipment	(6,380,490)	(3,768,337)
Proceeds from sale of equipment	968,168	3,000
Net cash used in investing activities	(5,412,322)	(3,765,337)
Cash Flows from Financing Activities:
Proceeds from long-term debt	3,756,800	2,320,200
Principal payments on long-term debt and capitalized leases	(3,567,629)	(4,371,488)
Proceeds from revolving loan	4,321,000	240,000
Principal payments on revolving loan	(2,750,000)
Principal payments on related party note payable and capital lease	(233,302)	(172,999)
Dividends paid on preferred stock	(208,045)	(313,288)
Distributions paid by non-controlling interest	(153,000)	(181,400)
Net cash provided by (used in) financing activities	1,165,824	(2,478,975)
Net Increase (Decrease) in Cash	715,263	(244,985)
Cash, beginning of period	379,632	579,021
Cash, end of period	1,094,895	334,036
Non-cash Activities:
Acquisition of equipment by capital lease	4,667,380	1,998,500
Capital expenditures in accounts payable	38,445
Revolver loan converted to term loan		2,500,000
Preferred dividend accrual	108,219
Supplemental information:
Interest paid	1,394,789	993,994
Taxes paid		$ 10,000