Note 13 - Income Taxes - Net Operating Loss Carry Forwards and Tax Credit Carry Forwards Available to Offset Future Federal Income Tax (Details) $ in Thousands	Mar. 31, 2015 USD ($)
Expiration Tax Year 2020 [Member]
Tax Credit Carryforward, Amount	$ 8
Expiration Tax Period 2021 [Member]
Tax Credit Carryforward, Amount	2
Expiration Tax Year 2022 [Member]
Operating Loss Carryforwards	3,191
Expiration Tax Year 2023 [Member]
Tax Credit Carryforward, Amount	1
Operating Loss Carryforwards	1,863
Expiration Tax Year 2026 [Member]
Operating Loss Carryforwards	159
Expiration Tax Year 2027 [Member]
Tax Credit Carryforward, Amount	1
Operating Loss Carryforwards	2,665
ExpirationTax Year 2028 [Member]
Tax Credit Carryforward, Amount	16
Operating Loss Carryforwards	1,612
Expiration Tax Year 2031 [Member]
Operating Loss Carryforwards	389
Expiration Tax Year 2032 [Member]
Operating Loss Carryforwards	$ 44
Expiration Tax Year 2033 [Member]
Tax Credit Carryforward, Amount
Operating Loss Carryforwards	$ 76
Expiration Tax Year 2034 [Member]
Tax Credit Carryforward, Amount
Operating Loss Carryforwards	$ 216
Tax Credit Carryforward, Amount	28
Operating Loss Carryforwards	$ 10,215