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Note 9 - Employee Benefit Plans	12 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note 9 . Employee Benefit Plan s We adopted our 401 (k) plan effective January 1, 2000. Participation is voluntary, and employees are eligible the first day of the following month that an employee attains an age of 21 and one hour of service time. We match 100 percent of the employee’s contributions up to four percent of the employee’s salary and those contributions are vested immediately. Prior to January 1, 2017, we matched 50 percent of the employee’s contribution up to six percent of the employee’s salary and those contributions were vested immediately. We contributed $680,000, $501,000 and $387,000, respectively, to the plan for the years ended March 31, 2018, 2017 and 2016.

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- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

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