Principal Maturities of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Debt maturing in 2014	$ 21,439
Debt maturing in 2015	19,651
Debt maturing in 2016	37,873
Debt maturing in 2017	1,102
Debt maturing in 2018	1,103
Debt maturing in 2019	1,152
Total debt	82,320	56,952
US Term Note
Debt Instrument [Line Items]
Debt maturing in 2014	5,687
Debt maturing in 2015	6,563
Debt maturing in 2016	12,250
Total debt	24,500	29,312
Europe Term Note
Debt Instrument [Line Items]
Debt maturing in 2014	7,330
Debt maturing in 2015	8,455
Debt maturing in 2016	23,114
Total debt	38,899	4,476
W.E.T. Term Note
Debt Instrument [Line Items]
Debt maturing in 2014	6,700
Debt maturing in 2015	2,813
Debt maturing in 2016	1,407
Total debt	10,920	18,852
DEG Loan
Debt Instrument [Line Items]
Debt maturing in 2015	1,102
Debt maturing in 2016	1,102
Debt maturing in 2017	1,102
Debt maturing in 2018	1,103
Debt maturing in 2019	1,152
Total debt	5,561	3,172
Capital Leases
Debt Instrument [Line Items]
Debt maturing in 2014	1,722
Debt maturing in 2015	718
Total debt	$ 2,440	$ 1,140

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

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