XML 61 R51.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note J - Commitments and Contingencies (Details Textual) | Jan. 31, 2019 USD ($)
--- | ---
Letters of Credit Outstanding, Amount | $ 250,000

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant