Debt - Additional Information (Details) - USD ($)			3 Months Ended	6 Months Ended
	Nov. 09, 2016	Jun. 26, 2015	Dec. 31, 2016	Mar. 31, 2017	Nov. 30, 2016	Sep. 30, 2016	Jan. 01, 2016
Line of Credit Facility [Line Items]
Outstanding borrowings				$ 8,968,000
Foreign debt borrowings, current				28,966,000		$ 31,009,000
Revolving credit agreement				21,573,000		12,751,000
Foreign debt borrowings, long-term debt, current portion				7,393,000		18,258,000
Foreign Subsidiary Borrowings
Line of Credit Facility [Line Items]
Outstanding borrowings				9,168,000		9,540,000
Foreign debt borrowings, current				6,322,000		5,833,000
Revolving credit agreement				4,043,000		3,262,000
Foreign debt borrowings, long-term debt, current portion				1,575,000		2,014,000
Foreign debt borrowings, factoring payable, current				704,000		557,000
Receivables pledged as collateral, carrying value				$ 1,131,000		$ 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%
Credit Facility
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
Credit Facility | 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				5.10%
Fixed interest rate after effect of interest rate swap	5.80%
Debt issuance costs incurred				$ 61,000
Accumulated amortization of debt issuance costs				$ 6,000
Credit Facility | Term Loan | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Basis spread on LIBOR				4.25%
Credit Facility | 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				4.70%
Revolving line of credit, debt Issuance costs incurred, gross				$ 725,000
Revolving line of credit, accumulated amortization of debt issuance costs				$ 181,000
Credit Facility | Line of Credit | Minimum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.15%
Credit Facility | Line of Credit | Maximum
Line of Credit Facility [Line Items]
Commitment fee percentage	0.375%
Credit Facility | 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 | 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
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