Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2009
Discontinued Operations And Disposal Groups [Abstract]
Gain from discontinued operations, net of tax	$ 0	$ 0	$ 0	$ 153,000	[1]	$ 61,000	[1]	$ 187,000
Negotiated consideration for 3D product line sales								2,700,000
Negotiated consideration for the sales of discontinued operation in the form of cash								320,000
Negotiated consideration for the sales of discontinued operation in the form of notes receivable								2,400,000
Carrying value of intangible assets sold								$ 0

[1] See Note 1 "Significant Accounting Policies - Intangible Assets" of Notes to Consolidated Financial Statements.