Note 11 - Accrued Expenses (Details Textual) - USD ($) $ in Millions	Mar. 09, 2018	Mar. 08, 2018	Mar. 31, 2018
Recall Payable			$ 0.4
Former Chief Executive Officer [Member]
Severance Benefit Following Retirement	$ 1.7
Severance Benefit Following Retirement, Term	1 year 180 days
Severance Benefit, For A One Year Post Retirement Consulting Agreement		$ 0.3