Basic and Diluted Income (Loss) Per Common Share (Details) (USD $) In Thousands, except 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 loss	$ (8,199)	$ 158	$ (9,354)	$ 688
Denominator:
Weighted-average shares outstanding for basic earnings per share (in shares)	18,299,108	18,391,988	18,320,653	18,398,790
Effect of dilutive securities:
Employee stock options (in shares)	0	97,702	0	96,903
Adjusted weighted-average shares outstanding and assumed conversions for diluted earnings per share (in shares)	18,299,108	18,489,690	18,320,653	18,495,693
Shares related to dilutive securities excluded because inclusion would be anti-dilutive (in shares)	2,916,427	2,816,873	2,918,692	2,756,624