Annual report pursuant to Section 13 and 15(d)

Note 7 - Preferred Stock Issuance and Conversion (Details Textual)

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Note 7 - Preferred Stock Issuance and Conversion (Details Textual) - Series B Preferred Stock [Member] - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2007
Dec. 31, 2006
Dec. 31, 2005
Dec. 31, 2004
Dec. 31, 2003
Other Noncurrent Liabilities [Member]                          
Preferred Stock of Subsidiary Accrued Dividends $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000 $ 64,000
Preferred Stock, Liquidation Preference Per Share $ 1                        
Preferred Stock of Subsidiary Redeemable Price per Share $ 1                        
Preferred Stock, Dividend Rate, Percentage 5.00%                        
Preferred Stock of Subsidiary per Share Amount on Which Dividend Rate Applied $ 1                        
Dividends Payable $ 867,000