Description of Business and Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of the number of shares used in calculation of basic and diluted income (loss) per share
Weighted average shares outstanding for basic income (loss) per share	11,058	10,943	10,922	10,875	10,703	10,610	10,563	10,430	10,945	10,594
Dilutive effect of common stock equivalent shares									504
Weighted average shares outstanding for diluted income (loss) per share	11,310	11,474	10,922	10,875	10,703	10,610	10,529	11,704	11,449	10,594