Note 10. Dividends Payable (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Nov. 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	$ 104,000	$ 104,000
Dividends Payable, Current	$ 267,000		$ 267,000			$ 160,000