Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)	12 Months Ended
Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Valuation Allowance for Accounts and Notes Receivable Beginning Balance	$ 536,093	$ 670,471	$ 729,060
Valuation Allowance and Reserves Charged to Cost and Expense	166,868	138,125	171,000
Valuation Allowances and Reserves Deductions	196,989	272,503	229,589
Valuation Allowance for Accounts and Notes Receivable Ending Balance	$ 505,972	$ 536,093	$ 670,471

Amount of valuation and qualifying accounts and reserves.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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Amount of decrease in valuation and qualifying accounts and reserves.

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