Calculation of Basic and Diluted Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Net Income	$ 150	$ 1,559	$ 75	$ 2,955
Numerator for basic earnings per share - income available to common shareholders	150	1,559	75	2,955
Effect of dilutive securities:
6% Convertible Debenture Interest Expense		14		36
Numerator for diluted income per share - income available to common shareholders after assumed conversions	$ 150	$ 1,573	$ 75	$ 2,991
Denominator:
Denominator for basic income per share - weighted-average shares	2,998	2,769	2,992	2,585
Effect of dilutive securities:
Employee stock options	(1)	40	(1)	39
Detachable warrants	407	461	204	457
6% Convertible Debenture		192		370
Dilutive potential common shares	406	693	204	866
Denominator for diluted income per share - weighted-average shares and assumed conversions	3,404	3,462	3,196	3,451
Basic income per common share (in dollars per share)	$ 0.05	$ 0.56	$ 0.03	$ 1.14
Diluted income per common share (in dollars per share)	$ 0.04	$ 0.45	$ 0.02	$ 0.87