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Note 5 - Convertible Notes to Related Parties (Details Textual)		1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 29, 2011 shares	Apr. 30, 2011 USD ($) shares	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Convertible Debt Securities [Member] | Common Stock [Member]
Debt Instrument Conversion Ratio Shares | shares		1,250
Convertible Debt Securities [Member] | In Case of Debt Conversion [Member]
Debt Instrument, Face Amount			$ 5,840,000		$ 5,840,000
Debt Instrument, Convertible, Number of Equity Instruments					7,301,000
Convertible Debt Securities [Member]
Debt Instrument, Interest Rate, Stated Percentage		6.00%
Debt Instrument Conversion Ratio Multiple of Principal		$ 1,000
Beneficial Ownership after Conversion		9.99%
Notice Period Associated with Beneficial Ownership Percentage Limitation Convertible Notes		61 days
Paid-in-Kind Interest					$ 171,000
Debt Instrument, Increase (Decrease), Other, Net					171,000
Convertible Notes Payable, Related Parties, Current			2,558,000		2,558,000
Debt Instrument, Face Amount			5,840,000		5,840,000
Debt Instrument, Unamortized Discount			3,282,000		3,282,000
Convertible Debt Issuable in Connection with Private Placement		$ 4,500,000
Proceeds from Convertible Debt		$ 4,300,000
Common Shares Registered for Resale in Connection with Convertible Notes | shares	3,500,000
Interest Expense, Debt, Excluding Amortization			88,000	$ 83,000	174,000	$ 164,000
Amortization of Debt Discount (Premium)			170,000	$ 154,000	336,000	$ 305,000
Convertible Notes Payable, Related Parties, Current			$ 2,558,000		$ 2,558,000		$ 2,222,000

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