Note 4 - Fair Value (Details Textual) xbrli-pure in Thousands, $ in Thousands	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)
Derivative, Number of Instruments Held	0	0
Debt, Long-term and Short-term, Combined Amount	$ 78,000	$ 87,100
Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure, Recurring	0	0
Liabilities, Fair Value Disclosure, Recurring	$ 0	$ 0