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Note 1 - Business and Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 1 - Business and Significant Accounting Policies (Details) [Line Items]
Deferred Pre Contract Costs	100,000pdfs_DeferredPreContractCosts	700,000pdfs_DeferredPreContractCosts
Impairment of Deferred Costs	1,892,000pdfs_ImpairmentOfDeferredCosts
Number of Impaired Contracts	2pdfs_NumberOfImpairedContracts
Unbilled Receivables, Current	9,700,000us-gaap_UnbilledReceivablesCurrent	8,000,000us-gaap_UnbilledReceivablesCurrent
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Note 1 - Business and Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage	80.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	76.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Accounts Receivable [Member]
Note 1 - Business and Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Note 1 - Business and Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage	79.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	74.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Customer Concentration Risk [Member]
Note 1 - Business and Significant Accounting Policies (Details) [Line Items]
Concentration Risk, Percentage	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember

X

- Definition

Deferred cost incurred for specific anticipated contracts.

+ References

No definition available.

+ Details

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X

- Definition

Represents the impairment of deferred costs related to design-to-silicon-yield solutions. This may include, for example, deferred pre-contract costs as it is determined that the costs are no longer recoverable.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

The number of contracts that were impaired during the period.

+ References

No definition available.

+ Details

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



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-Publisher FASB

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-Section 50

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X

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

+ References

No definition available.

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