Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Narrative) (Details)

Long-Term Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	May 28, 2010	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Mar. 08, 2013
Line Of Credit Facility And Long Term Debt [Line Items]
Unamortized discount		$ 4,119
Subordinated Debt		18,491us-gaap_SubordinatedDebt	17,154us-gaap_SubordinatedDebt
Subordinated Borrowing, Interest Rate	5.00%
Machinery and Equipment, Gross		11,892us-gaap_MachineryAndEquipmentGross	13,868us-gaap_MachineryAndEquipmentGross
Credit facility maximum borrowing capacity		30,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		15,262	16,987
Revolving Credit Facility [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding			10,320
Foreign Credit Facility [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding		3,844	997
Term Facility [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Credit facility maximum borrowing capacity		15,000
Credit facility current borrowing capacity		10,000
Acquisition Facility [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Credit facility maximum borrowing capacity		10,000
Accordion Feature [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Credit facility maximum borrowing capacity		10,000
Zions First National Bank [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding		0
Credit facility maximum borrowing capacity		20,000
Debt maturity date		Apr. 01, 2017
Foreign Financial Institutions [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding		0	340
Credit facility maximum borrowing capacity		7,684	1,956
Credit facility expiration date		Jan. 31, 2015
Drawing on credit facility		3,844	314
Gregory Stockholders [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Discounted subordinated notes		13,127
Accretion of discount		1,337	1,162	1,012
Subordinated Debt		22,056
Subordinated Borrowing, Interest Rate		5.00%
Government Entity And Other Financial Institutions [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Interest rate range, minimum		0.75%
Interest rate range, maximum		5.50%
Second Amended and Restated Loan Agreement Opiton 1 [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		0.60%
Second Amended and Restated Loan Agreement Opiton 1 [Member] \| LIBOR [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		4.00%
Second Amended and Restated Loan Agreement Opiton 2 [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		0.50%
Second Amended and Restated Loan Agreement Opiton 2 [Member] \| LIBOR [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		3.00%
Second Amended and Restated Loan Agreement Opiton 3 [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		0.40%
Second Amended and Restated Loan Agreement Opiton 3 [Member] \| LIBOR [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Imputed interest rate		2.00%
Loan Agreement [Member] \| Term Facility [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding					8,954	10,000
Credit facility current borrowing capacity						15,000
Credit facility remaining borrowing capacity						5,000
Assets Held Under Capital Leases [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Machinery and Equipment, Gross		0	228
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment		0	98
Securitized Receivables Facilities [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Line of credit facility, amount outstanding			683
Credit facility current borrowing capacity			2,314
Securitized accounts receivable			683
Liabilities related to securitized assets			683
Additional Subordinated Debt [Member] \| Gregory Stockholders [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Discounted subordinated notes		316
Subordinated Debt		554
Minimum [Member] \| Foreign Financial Institutions [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Variable interest rate		2.61%
Minimum [Member] \| Government Entity And Other Financial Institutions [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Monthly payments		0
Maturity date range start		Jan. 01, 2016
Minimum [Member] \| Loan Agreement [Member] \| LIBOR [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Debt to EBITDA ratio used in margin calculation		1.00
Maximum [Member] \| Government Entity And Other Financial Institutions [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Monthly payments		$ 3
Maturity date range start		Mar. 01, 2017
Maximum [Member] \| Loan Agreement [Member]
Line Of Credit Facility And Long Term Debt [Line Items]
Debt to EBITDA ratio used in margin calculation		2.00