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	$ 367	$ 1,168	$ 452	$ 1,999
Add back of interest on convertible subordinated debt, net of taxes	0	185	0	371
Add back of amortization of discount on convertible subordinated debt, net of taxes	0	87	0	175
Adjustment for change in value of convertible note derivative, net of taxes	0	(121)	0	30
Numerator for diluted earnings per share	$ 367	$ 1,319	$ 452	$ 2,575
Denominator:
Weighted average shares outstanding-basic (in shares)	8,586	9,230	8,585	9,205
Dilutive effect of stock options (in shares)	285	193	275	197
Dilutive effect of convertible subordinated debt		2,694		2,694
Weighted average shares outstanding-diluted (in shares)	8,871	12,117	8,860	12,096
Basic Earnings per Share (in dollars per share)	$ 0.04	$ 0.13	$ 0.05	$ 0.22
Diluted Earnings per Share (in dollars per share)	$ 0.04	$ 0.11	$ 0.05	$ 0.21