Note 8 - Subsequent Events (Details Textual) - Revolving Credit Facility [Member] - London Interbank Offered Rate (LIBOR) [Member]		3 Months Ended
Aug. 01, 2018	Jul. 01, 2018
Debt Instrument, Basis Spread on Variable Rate		2.00%
Subsequent Event [Member]
Debt Instrument, Basis Spread on Variable Rate	1.75%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration