Senior Debt - Additional Information (Detail)	3 Months Ended	12 Months Ended				12 Months Ended			12 Months Ended		12 Months Ended																	12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2012 USD ($)	Aug. 27, 2013 USD ($)	Dec. 31, 2013 Flextor, Inc. ("Flextor") [Member] USD ($)	Dec. 31, 2013 Flextor, Inc. ("Flextor") [Member] CAD	Dec. 31, 2012 Flextor, Inc. ("Flextor") [Member] USD ($)	Dec. 31, 2013 Aarding Thermal Acoustics B.V. ("Aarding") [Member]	Aug. 17, 2012 Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Dec. 31, 2013 First Twelve Installments [Member] USD ($)	Dec. 31, 2013 Second Four Installments [Member] USD ($)	Dec. 31, 2013 Third Three Installments [Member] USD ($)	Dec. 31, 2013 Bank Guarantee Facility [Member] Flextor, Inc. ("Flextor") [Member] USD ($)	Dec. 31, 2013 Bank Guarantee Facility [Member] Flextor, Inc. ("Flextor") [Member] CAD	Dec. 31, 2013 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] USD ($)	Dec. 31, 2013 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Aug. 17, 2012 Bank Guarantee Facility [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Dec. 31, 2013 Forward Contracts [Member] Flextor, Inc. ("Flextor") [Member] CAD	Dec. 31, 2013 Variable Line Of Credit [Member] Flextor, Inc. ("Flextor") [Member] CAD	Dec. 31, 2013 Bank Overdrafts [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] USD ($)	Dec. 31, 2013 Bank Overdrafts [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Aug. 17, 2012 Bank Overdrafts [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member] EUR (€)	Dec. 31, 2013 Deferred Charges and Other Assets [Member] USD ($)	Dec. 31, 2013 Discount to Debt [Member] USD ($)	Dec. 31, 2013 Minimum [Member] Flextor, Inc. ("Flextor") [Member] USD ($)	Aug. 17, 2012 Minimum [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member]	Dec. 31, 2013 Maximum [Member] Flextor, Inc. ("Flextor") [Member]	Dec. 31, 2013 Base Rate [Member] Minimum [Member]	Dec. 31, 2013 Base Rate [Member] Maximum [Member]	Dec. 31, 2013 Eurocurrency Rate [Member] Minimum [Member]	Dec. 31, 2013 Eurocurrency Rate [Member] Maximum [Member]	Dec. 31, 2013 Federal Funds Rate [Member]	Dec. 31, 2013 One-Month LIBOR [Member]	Dec. 31, 2013 Prime Rate [Member] Flextor, Inc. ("Flextor") [Member]	Dec. 31, 2013 Euribor Rate [Member] Aarding Thermal Acoustics B.V. ("Aarding") [Member]	Dec. 31, 2013 Senior Secured Term Loan [Member] USD ($)	Aug. 27, 2013 Senior Secured Term Loan [Member] USD ($)	Dec. 31, 2013 U.S. dollar Revolving Credit Facility [Member] USD ($)	Aug. 27, 2013 U.S. dollar Revolving Credit Facility [Member] USD ($)	Aug. 27, 2013 Multi-currency Revolving Credit Facility [Member] USD ($)
Line of Credit Facility [Line Items]
Senior secured credit facility																																						$ 65,000,000		$ 70,500,000	$ 19,500,000
Increased credit facility commitment for either revolving credit facility or term loan facility					30,000,000
Aggregate principal amount outstanding under the credit facilities		85,800,000				0		0						0		3,400,000	2,500,000				4,900,000	3,500,000															65,000,000		52,000,000
Letters of credit drawn		1,300,000
Weighted average interest rate on outstanding borrowings under the Credit Agreement		2.23%	2.23%
Interest rate, basis spread																													0.50%	1.50%	1.50%	2.50%	0.50%	1.00%	0.50%	1.95%
Base rate, description		"Base Rate" means the highest of (a) the federal funds rate plus 0.5%, (b) the Agent's prime lending rate, and (c) one-month LIBOR plus 1.00%.	"Base Rate" means the highest of (a) the federal funds rate plus 0.5%, (b) the Agent's prime lending rate, and (c) one-month LIBOR plus 1.00%.
Capitalized deferred financing costs		2,700,000
Revolving loan expiration date		Aug. 27, 2018	Aug. 27, 2018
Amortization of deferred finance cost	100,000	304,000		227,000
Capitalized deferred financing costs																								600,000	1,900,000
Quarterly repayment of term loans											1,200,000	1,600,000	2,000,000
Maximum consolidated leverage ratio		2.75	2.75
Minimum fixed charge coverage ratio		1.25	1.25
Increased interest rate of loan due to default		2.00%	2.00%
Facilities agreement, amount							5,500,000			7,000,000					2,500,000			3,500,000	500,000	2,500,000			3,500,000
Working capital ratio, minimum						125.00%	125.00%
Working capital, minimum																										1,000,000
Adjusted tangible net worth ratio, maximum																												2.50
Adjusted tangible net worth, minimum						1,300,000
Borrowers solvency ratio																											30.00%
Maximum debt as proportion of EBITDA										3
Debt instrument variable interest rate description									3 months Euribor plus 195 basis points
Bank guarantee and overdraft interest rate									2.23%
Note payable to a bank		300,000	200,000
Note payable to a bank, quarterly installments		$ 34,000	€ 25,000
Note payable to a bank, fixed interest rate applied		3.82%	3.82%