Debt - Additional Information (Details) - USD ($)	Nov. 09, 2016	Jun. 26, 2015	Dec. 31, 2016	Sep. 30, 2016	Jan. 01, 2016
Line of Credit Facility [Line Items]
Outstanding borrowings			$ 9,567,000
Foreign debt borrowings, current			33,592,000	$ 31,009,000
Revolving credit agreement			25,337,000	12,751,000
Foreign debt borrowings, long-term debt, current portion			8,255,000	18,258,000
Foreign Subsidiary Borrowings
Line of Credit Facility [Line Items]
Outstanding borrowings			10,184,000	9,540,000
Foreign debt borrowings, current			7,178,000	5,833,000
Revolving credit agreement			4,294,000	3,262,000
Foreign debt borrowings, long-term debt, current portion			1,771,000	2,014,000
Foreign debt borrowings, factoring payable, current			1,113,000	557,000
Receivables pledged as collateral, carrying value			$ 1,561,000	$ 1,156,000
Foreign Subsidiary Borrowings | Euro Interbank Offered Rate (Euribor) | Minimum
Line of Credit Facility [Line Items]
Euribor variable interest rates			1.00%
Foreign Subsidiary Borrowings | Euro Interbank Offered Rate (Euribor) | Maximum
Line of Credit Facility [Line Items]
Euribor variable interest rates			4.00%
2016 Amended and Restated Agreement Credit and Security Agreement
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 39,871
Debt issuance costs incurred	498,000
Debt issuance costs related to the term loan and revolving credit facility, gross			$ 786,000
2016 Amended and Restated Agreement Credit and Security Agreement | Term Loan
Line of Credit Facility [Line Items]
Issued amount of debt	4,871,000
Installment payment	$ 81,000
Weighted average interest rate, term loan			4.90%
Fixed interest rate after effect of interest rate swap	5.80%
Debt issuance costs incurred			$ 61,000
Accumulated amortization of debt issuance costs			$ 2,000
2016 Amended and Restated Agreement Credit and Security Agreement | Term Loan | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on LIBOR	4.25%
2016 Amended and Restated Agreement Credit and Security Agreement | Line of Credit
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity	$ 35,000,000
Weighted average interest rate, revolving credit facility			4.50%
Revolving line of credit, debt Issuance costs incurred, gross			$ 725,000
Revolving line of credit, accumulated amortization of debt issuance costs			$ 131,000
2016 Amended and Restated Agreement Credit and Security Agreement | Line of Credit | Minimum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.15%
2016 Amended and Restated Agreement Credit and Security Agreement | Line of Credit | Maximum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.375%
2016 Amended and Restated Agreement Credit and Security Agreement | Line of Credit | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on LIBOR	3.75%
2015 Credit Agreement
Line of Credit Facility [Line Items]
Debt issuance costs incurred		$ 724,000
Write off of deferred debt issuance cost due to debt modification	$ 241,000
2015 Credit Agreement | Term Loan
Line of Credit Facility [Line Items]
Issued amount of debt		20,000,000
Installment payment		$ 714,000
Debt agreement term		5 years
2015 Credit Agreement | Revolving Credit Facility
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity		$ 25,000,000			$ 20,000,000
Debt agreement term		5 years
Percentage of stock of non-U.S. subsidiaries pledged		65.00%
Accordion feature, amount of increase in borrowing capacity		$ 15,000,000