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Note 9 - 401(k) Savings Plan
12 Months Ended
Apr. 30, 2017
Notes to Financial Statements  
Pension and Other Postretirement Benefits Disclosure [Text Block]
9.
401
(k) SAVINGS PLAN:
 
We have a defined contribution plan authorized under Section
401
(k) of the Internal Revenue Code. All benefits-eligible employees with at least
thirty
days of service are eligible to participate in the plan; however there are only
two
entry dates per calendar year. The Plan
may
match subject to the annual approval of the Board of Directors,
100
percent of every pre-tax dollar an employee contributes up to
6%
of the employee's salary. Employees are
100
percent vested in the employer's contributions immediately. Our matching contribution, as approved by the Board of Directors was paid in common stock of the Company.
 The contribution amount was valued at the market price of the stock contributed in
2017
and
2016
was approximately
$251
and
$241
respectively.