Description of Business and Accounting Policies - Reconciliation of Number of Shares Used in Calculation of Basic and Diluted Income (Loss) Per Share (Detail) In Thousands, 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
Earnings Per Share [Abstract]
Weighted average shares outstanding for basic income (loss) per share	11,735	11,655	11,510	11,390	11,246	11,194	11,149	11,107	11,574	11,174
Dilutive effect of common stock equivalent shares									214
Weighted average shares outstanding for diluted income (loss) per share	11,945	11,832	11,715	11,390	11,246	11,194	11,149	11,107	11,788	11,174