Note 10. Dividends Payable (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Aug. 01, 2016 USD ($)	Dec. 31, 2015 USD ($)
Series 1 [Member]
Preferred Stock Dividends, Income Statement Impact			$ 13,000
Preferred Stock, Dividend Rate, Percentage			5.00%
Series 2 [Member]
Preferred Stock Dividends, Income Statement Impact			$ 14,000
Preferred Stock, Dividend Rate, Percentage			5.00%
Series 3 [Member]
Preferred Stock Dividends, Income Statement Impact			$ 8,000
Preferred Stock, Dividend Rate, Percentage			5.00%
Series 2 Preferred Stock and Series 3 Preferred Stock [Member]
Preferred Stock Unpaid Dividends Additional Late Fee Penalty Percentage			18.00%
Number of Outside Board Members Holding Interest In Preferred Stock			1
Period From Issuance of Written Notice For Failure to Pay Dividend Within Which Entity Must Cure Breach			45 days
Preferred Stock, Redemption Amount					$ 2,200,000
Preferred Stock Dividends, Income Statement Impact	$ 35,000	$ 35,000	$ 69,000	$ 69,000
Dividends Payable, Current	$ 231,000		$ 231,000			$ 160,000