Consolidated Statements of Income - USD ($)	12 Months Ended
May 31, 2017	May 31, 2016
Income Statement [Abstract]
Sales	$ 40,044,110	$ 26,340,405
Cost of Sales	32,573,570	21,591,039
Gross Profit	7,470,540	4,749,366
General, Selling and Administrative Expenses	3,015,960	2,555,249
Operating Income	4,454,580	2,194,117
Other Income (Expense):
Other income	17,175
Interest expense	(1,212,857)	(862,428)
Income before Income Taxes	3,258,898	1,331,689
Provision for Income Taxes	1,011,990	495,555
Net Income	2,246,908	836,134
Income Attributable to Variable Interest Entity	(240,165)	(232,833)
Preferred Dividends	(345,822)	(331,575)
Net Income Attributable to Common Stockholders	$ 1,660,921	$ 271,726
Income Per Share of Common Stock - Basic and Diluted	$ 0.06	$ 0.01
Weighted Average Shares of Common Stock Outstanding - Basic	28,322,160	27,701,911
Weighted Average Shares of Common Stock Outstanding - Diluted	28,906,086	28,042,200

Total costs related to goods produced and sold during the reporting period.

Name:	us-gaap_CostOfGoodsSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

No definition available.