Description of Business and Basis of Presentation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of computation of basic and diluted net income (loss) per share
Net income	$ 319	$ (278)
Effect of assumed conversion of convertible debentures
Weighted-average common shares outstanding	29,047	28,825
Weighted-average common shares outstanding, assuming dilution	29,216	28,825
Net income per share
Basic	$ 0.01	$ (0.01)
Diluted	$ 0.01	$ (0.01)
Stock Options
Effect of assumed conversion of convertible debentures
Effect of potentially dilutive securities	76	0
Restricted Stock [Member]
Effect of assumed conversion of convertible debentures
Effect of potentially dilutive securities	53	0
Restricted Stock Unit
Effect of assumed conversion of convertible debentures
Effect of potentially dilutive securities	38	0
Employee Stock Purchase Plan
Effect of assumed conversion of convertible debentures
Effect of potentially dilutive securities	2	0