Note 9 - March 2014 Financing (Details) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended	45 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 10, 2014	Feb. 24, 2014	Dec. 31, 2013
Note 9 - March 2014 Financing (Details) [Line Items]
Conversion Offering Price Percentage	85.00%
Convertible Preferred Stock Future Public Offer Benchmark	$ 10,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)					5.04
Debt Default, Short-term Debt, Amount	1,000	1,000	1,000
Preferred Stock, Value, Subscription Reduction	20
Proceeds from Issuance of Preferred Stock and Preference Stock	10,171	10,171	10,171
Payments of Stock Issuance Costs	180	(180)	(180)
Preferred Stock, Value, Subscriptions	329	329	329			500
Derivative Liability, Noncurrent	9,087	9,087	9,087	7,404
Expected to Recieve [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Payments of Stock Issuance Costs		29
Note Warrant 1 [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term	5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	4.25	4.25	4.25
Warrant Exercise Price Conversion Percentage	125.00%
Note Warrant 1 [Member] | Minimum [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right, Percent	50.00%	50.00%	50.00%
Note Warrant 1 [Member] | Maximum [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right, Percent	100.00%	100.00%	100.00%
Note Warrant 2 [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Term	5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	5.10	5.10	5.10
Warrant Exercise Price Conversion Percentage	150.00%
Note Warrant 2 [Member] | Minimum [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right, Percent	50.00%	50.00%	50.00%
Note Warrant 2 [Member] | Maximum [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right, Percent	100.00%	100.00%	100.00%
March 2014 Warrants [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Derivative Liability, Noncurrent	408	408	408
Mezzanine Equity [Member] | Series C Preferred Stock [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Payments of Stock Issuance Costs		180
Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value	3,096	3,096	3,096
Mezzanine Equity [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value	0	0	0			0
Series C Preferred Stock [Member]
Note 9 - March 2014 Financing (Details) [Line Items]
Proceeds from Issuance of Convertible Preferred Stock	$ 11,720
Preferred Stock, Dividend Rate, Percentage	8.00%
Share Price (in Dollars per share)	$ 3.40	$ 3.40	$ 3.40
Stock Issued During Period, Shares, Share-based Compensation, Forfeited (in Shares)	40