Organization and Significant Accounting Policies - Summary of Intangible Asset Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Gross Carrying Amount	$ 9,413	$ 9,108
Accumulated Amortization	(5,108)	(4,270)
Net Carrying Amount	4,305	4,838
Customer lists
Gross Carrying Amount	4,567	4,567
Accumulated Amortization	(2,541)	(2,186)
Net Carrying Amount	2,026	2,381
Tradenames
Amortization Period	8 years
Gross Carrying Amount	351	351
Accumulated Amortization	(219)	(175)
Net Carrying Amount	132	176
Patent assets
Gross Carrying Amount	2,388	2,083
Accumulated Amortization	(822)	(667)
Net Carrying Amount	1,566	1,416
Covenants not to compete
Gross Carrying Amount	376	376
Accumulated Amortization	(376)	(313)
Net Carrying Amount	0	63
Acquired technologies
Gross Carrying Amount	1,731	1,731
Accumulated Amortization	(1,150)	(929)
Net Carrying Amount	$ 581	$ 802
Minimum | Customer lists
Amortization Period	3 years
Minimum | Patent assets
Amortization Period	12 years
Minimum | Covenants not to compete
Amortization Period	5 years
Minimum | Acquired technologies
Amortization Period	7 years
Maximum | Customer lists
Amortization Period	15 years
Maximum | Patent assets
Amortization Period	18 years
Maximum | Covenants not to compete
Amortization Period	6 years
Maximum | Acquired technologies
Amortization Period	8 years