Calculation of Basic and Diluted Earnings per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net loss	$ (1,710)	$ 296	$ 153	$ 707	$ (1,804)	$ 113	$ 150	$ (75)	$ (554)	$ (1,616)
Numerator for diluted earnings per share - loss available to common shareholders after assumed conversions									$ (554)	$ (1,616)
Denominator:
Denominator for basic earnings per share - weighted-average shares	3,014	3,014	3,014	3,014	3,012	3,012	2,998	2,987	3,014	3,002
Dilutive potential common shares
Denominator for diluted earnings per share - weighted-average shares and assumed conversions	3,014	3,394	3,402	3,413	3,012	3,422	3,404	2,987	3,014	3,002
Basic earnings per common share (in dollars per share)	$ (0.57)	$ 0.1	$ 0.05	$ 0.23	$ (0.60)	$ 0.04	$ 0.05	$ (0.03)	$ (0.18)	$ (0.54)
Diluted earnings per common share (in dollars per share)	$ (0.57)	$ 0.09	$ 0.04	$ 0.21	$ (0.60)	$ 0.03	$ 0.04	$ (0.03)	$ (0.18)	$ (0.54)