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The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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The number of positions eliminated during the period as a result of restructuring activities.

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No definition available.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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-Topic 420

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Liabilities (Details 2) (USD $)	3 Months Ended
Liabilities (Details 2) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Reconciliation of the restructuring liability
Balance at the beginning of the period	$ 1,428,000us-gaap_RestructuringReserve
Provision	2,357,000us-gaap_RestructuringCharges	392,000us-gaap_RestructuringCharges
Payments	(2,292,000)us-gaap_PaymentsForRestructuring
Balance at the end of the period	1,493,000us-gaap_RestructuringReserve
Customer Deposits and Deferred Revenue
Customer deposits	66,700,000us-gaap_CustomerDepositsCurrent		73,000,000us-gaap_CustomerDepositsCurrent
Hyeongok-ri, South Korea Facility
Reconciliation of the restructuring liability
Number of employees impacted	23
Personnel severance and related costs
Reconciliation of the restructuring liability
Balance at the beginning of the period	1,428,000
Provision	1,532,000
Payments	(1,839,000)
Balance at the end of the period	1,121,000
Facility Closing Costs
Reconciliation of the restructuring liability
Provision	825,000
Payments	(453,000)
Balance at the end of the period	$ 372,000