Commitments And Contingencies (Details) € in Millions		1 Months Ended	3 Months Ended	6 Months Ended
	Sep. 02, 2014 USD ($) shares	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2015 EUR (€)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Commitments And Contingencies [Line Items]
Unreported loss liability						$ 1,500,000	$ 1,400,000
Recoverable insurance amounts						630,000	600,000
Liability estimated after a reasonable margin for statistical fluctuations						2,700,000
Incremental expense related to agreement			$ 1,400,000
Severance and cash payments expected to be made in October 2015						2,600,000
France [Member]
Commitments And Contingencies [Line Items]
Intangible assets and non-compete agreement, purchase price | €					€ 1.2
Chief Executive Officer [Member]
Commitments And Contingencies [Line Items]
Term of employment, effective September 2, 2014				3 years
CEO signing bonus	$ 200,000
Issuance of grants of stock options to CEO | shares	400,000
Issuance of grants of performance stock awards to CEO | shares	250,000
Former CEO [Member]
Commitments And Contingencies [Line Items]
Additional cash payment for Separation Agreement				$ 400,000
Percentage of CEO annual bonus for Separation Agreement				25.00%
Amount of CEO annual bonus for Separation Agreement				$ 100,000
Maximum [Member] | Former CEO [Member]
Commitments And Contingencies [Line Items]
Reimbursement of attorneys' fees				$ 20,000
CEO Post Employment Benefits [Member]
Commitments And Contingencies [Line Items]
Accrued expenses and other current liabilities payable upon the CEO's voluntary retirement							2,200,000
Severance payable							$ 2,000,000
Supplemental Employee Retirement Plan, Defined Benefit [Member]
Commitments And Contingencies [Line Items]
Amount paid related to achievement of contingent milestone		$ 500,000
Starch Technology Purchase [Member]
Commitments And Contingencies [Line Items]
Term of distribution agreement				15 years
Expected future contingent payment amounts to be initially recorded as research and development expense						$ 1,000,000