BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Apr. 30, 2016

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract]

At April 30, 2016, our compensating balances totaled $13.2 million and consisted of the following:


Financial Institution
First International Bank, Watford City, ND	$	6,000,000
Associated Bank, Green Bay, WI		3,000,000
The PrivateBank, Minneapolis, MN		2,000,000
Bremer Bank, Saint Paul, MN		1,285,000
Dacotah Bank, Minot, ND		350,000
Peoples State Bank, Velva, ND		225,000
American National Bank, Omaha, NE		200,000
Commerce Bank a Minnesota Banking Corporation		100,000
Total	$	13,160,000

Summary of Changes in Allowance for Doubtful Accounts

A summary of the changes in the allowance for doubtful accounts including properties held for sale for fiscal years ended April 30, 2016, 2015 and 2014 is as follows:


	(in thousands)
	2016		2015		2014
Balance at beginning of year	$	1,156	$	1,044	$	1,393
Provision		651		967		434
Write-off		(861)		(855)		(783)
Balance at close of year	$	946	$	1,156	$	1,044