Note 9 - Income Taxes (Details) - Approximate Amount Of Unused Operating Loss Carry Forwards and Expiration Dates (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Jun. 03, 2013	Feb. 05, 2013	Jul. 25, 2011
Operating Loss Carryforwards [Line Items]
$	$ 155,711	$ 156,000	$ 34,000	$ 34,000	$ 90,000
Expires 2022 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	5,003
Expires 2023 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	2,292
Expires 2024 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	15,655
Expires 2025 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	8,174
Expires 2026 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	7,367
Expires 2028 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	10,716
Expires 2029 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	14,300
Expires 2030 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	18,045
Expires 2031 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	21,386
Expires 2032 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	20,558
Expires 2033 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	10,319
Expires 2034 [Member]
Operating Loss Carryforwards [Line Items]
Amount of unused operating loss carry forwards	$ 21,896