CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 19,311us-gaap_NetIncomeLoss	$ 7,370us-gaap_NetIncomeLoss	$ (2,805)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	7,849us-gaap_DepreciationAndAmortization	8,896us-gaap_DepreciationAndAmortization	10,724us-gaap_DepreciationAndAmortization
Charge to vacate a facility	0us-gaap_LossOnContractTermination	0us-gaap_LossOnContractTermination	1,980us-gaap_LossOnContractTermination
Loss on disposal of fixed assets	35	145	8
Share based compensation expense	5,651us-gaap_ShareBasedCompensation	5,832us-gaap_ShareBasedCompensation	9,912us-gaap_ShareBasedCompensation
Deferred income tax benefit	(248)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,560)us-gaap_DeferredIncomeTaxExpenseBenefit	(4,125)us-gaap_DeferredIncomeTaxExpenseBenefit
Impairment of supplier advance	0	0	2,100
Write-off of debt issuance costs	0	0	1,079
Other non-cash charges	22us-gaap_OtherNoncashExpense	48us-gaap_OtherNoncashExpense	179us-gaap_OtherNoncashExpense
Changes in operating assets and liabilities:
Receivables	(4,468)	749	2,711
Inventories	(811)us-gaap_IncreaseDecreaseInInventories	(2,451)us-gaap_IncreaseDecreaseInInventories	7,877us-gaap_IncreaseDecreaseInInventories
Other assets	(932)	1,192	2,466
Accounts payable	4,688	6,018	(9,213)
Accrued payroll and related benefits	(173)	5,397	647
Deferred revenue	196	885	427
Income taxes	3,051	2,316	(764)
Other accrued expenses and liabilities	(1,364)	549	(413)
Net cash provided by operating activities	32,807	35,386	22,790
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short term investments	(8,225)	(24,513)	(10,549)
Proceeds from sales of short term investments	8,121	11,137	17,382
Capital additions	(8,265)	(7,614)	(9,601)
Proceeds from the sale of fixed assets	0	28	0
Net cash used in investing activities	(8,369)	(20,962)	(2,768)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of borrowings under credit facility	0	0	(30,000)
Debt issuance costs	0us-gaap_PaymentsOfDebtIssuanceCosts	0us-gaap_PaymentsOfDebtIssuanceCosts	(207)us-gaap_PaymentsOfDebtIssuanceCosts
Exercise of stock options	314	0	10
Taxes related to equity compensation awards, net	(1,534)	(825)	(1,361)
Payment of dividends	(20,370)us-gaap_PaymentsOfDividendsCommonStock	(20,013)us-gaap_PaymentsOfDividendsCommonStock	(19,872)us-gaap_PaymentsOfDividendsCommonStock
Net cash used in financing activities	(21,590)	(20,838)	(51,430)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	2,848	(6,414)	(31,408)
CASH AND CASH EQUIVALENTS, beginning of year	9,772	16,186	47,594
CASH AND CASH EQUIVALENTS, end of year	$ 12,620	$ 9,772	$ 16,186

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- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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