Note 9 - Employee Benefit Plans (Details Textual) |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2016 |
Mar. 31, 2017
USD ($)
h
|
Mar. 31, 2016
USD ($)
|
Mar. 31, 2015
USD ($)
|
|
| Defined Contribution Plan Age of Employees Covered | 21 | |||
| Defined Contribution Plan Service Number of Hours of Employees Covered | h | 1 | |||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 50.00% | 4.00% | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% | 100.00% | ||
| Defined Contribution Plan, Cost | $ | $ 501,000 | $ 387,000 | $ 330,000 | |