Term Loans Payable (Narrative) (Details) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
May 31, 2017 |
Aug. 31, 2016 |
Feb. 28, 2017 |
Sep. 01, 2016 |
|
| Sixth Modification Agreement [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Fixed charge coverage ratio | 85.00% | |||
| Seventh Modification Agreement [Member] | Extended Maturity [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Maturity date | Mar. 31, 2020 | |||
| Revolving Line Of Credit [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Maximum borrowing capacity | $ 35,000,000 | |||
| Term Loan [Member] | ||||
| Debt Instrument [Line Items] | ||||
| Loan amount | $ 15,000,000 | $ 5,000,000 | ||
| Percentage added to LIBOR rate | 1.85% | |||
| Principal payment | $ 312,500 | |||
| Remaining principal amount that may be repaid or converted | $ 1,250,000 |