Credit Facilities and Debt - Additional Information - CVS Short-Term Working Capital Borrowings (Detail) - 9 months ended Sep. 30, 2016 - CVS Working Capital Borrowing [Member]	USD ($) Bank	EUR (€) Bank
Line of Credit Facility [Line Items]
Number of Italian banks	12	12
Maximum borrowing capacity	$ 24,857,000	€ 22,119,000
Maximum amount available limited to the sum of eligible receivables	80.00%
Maximum amount available limited to order/contract issued	50.00%
Credit facilities guaranteed by parent	$ 660,000	588,000
Notes Payable	13,761,000	12,245,000
Guaranteed debt	660,000	588,000
Performance bonds, not guaranteed	$ 2,900,000	€ 2,500,000
Minimum [Member]
Line of Credit Facility [Line Items]
Borrowing facility interest rate	2.72%	2.72%
Maximum [Member]
Line of Credit Facility [Line Items]
Borrowing facility interest rate	6.70%	6.70%
Unsecured Debt
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 393,000	€ 350,000