Allowance for doubtful accounts receivable, minimum period

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- Definition

Number of geographic reporting units

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No definition available.

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- Definition

Period to calculate the fair value of reporting units

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No definition available.

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- Definition

Revenue collection period.

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No definition available.

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- Definition

Warranty agreement period

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No definition available.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

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- Definition

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

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- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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- Definition

Total increases or decreases in capitalized computer software costs for period.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 site	Dec. 31, 2013	Dec. 31, 2012
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts receivable, minimum	90 days
Number of geographic reporting units	3ddd_NumberOfGeographicReportingUnits
Period to calculate the fair value of reporting units	5 years
Goodwill impairment	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss
Software development costs capitalized	0	250	0
Amortization of software development costs	1,439	1,439	1,440
Net capitalized software costs aggregated	3,556us-gaap_CapitalizedComputerSoftwareNet	5,234us-gaap_CapitalizedComputerSoftwareNet	6,424us-gaap_CapitalizedComputerSoftwareNet
Senior convertible notes, rate	5.50%
Advertising expense	8,799us-gaap_AdvertisingExpense	6,010us-gaap_AdvertisingExpense	3,972us-gaap_AdvertisingExpense
International [Member]
Significant Accounting Policies [Line Items]
Revenue percentage	49.10%
Licenses And Patent Costs [Member]
Significant Accounting Policies [Line Items]
Licenses, patent and other long lived assets impairment	$ 0	$ 0	$ 0
Minimum [Member]
Significant Accounting Policies [Line Items]
Sale payment period	30 days
Property and equipment, useful life, in years	3 years
Intangible assets, useful life	1 year
Minimum [Member] \| Capitalized Software Costs [Member]
Significant Accounting Policies [Line Items]
Intangible assets, useful life	1 year
Minimum [Member] \| Licenses And Patent Costs [Member]
Significant Accounting Policies [Line Items]
Intangible assets, useful life	7 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Warranty agreement period	1 year
Sale payment period	60 days
Property and equipment, useful life, in years	30 years
Intangible assets, useful life	20 years
Maximum [Member] \| Capitalized Software Costs [Member]
Significant Accounting Policies [Line Items]
Intangible assets, useful life	8 years
Maximum [Member] \| Licenses And Patent Costs [Member]
Significant Accounting Policies [Line Items]
Intangible assets, useful life	20 years