Number of individual customers accounting for more than ten percent of accounts receivable.

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Number of individual customers accounting for more than ten percent of net product sales.

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Schedule Of Significant Accounting Policies [Line Items]

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 8
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-Name Accounting Standards Codification
-Glossary Current Liabilities
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Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 15
-Subparagraph a
-Article 7

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Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for contractual rent under lease arrangements.

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-Paragraph 1
-Subparagraph (SX 210.5-02.24)
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- Definition

Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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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

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References

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- Definition

Total carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue or other forms of income in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.Q4)
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain recognized in the income statement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
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-Paragraph 1
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-Paragraph 2
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- Definition

Amount before tax of foreign currency transaction realized and unrealized loss recognized in the income statement.

+ References

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- Definition

Balance held at close of period in number of shares.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
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-Paragraph 4
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-Subparagraph (SX 210.12-14.Column B)
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

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- Definition

Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
-Subparagraph (f)
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Significant Accounting Policies (Details) $ in Thousands	3 Months Ended
Significant Accounting Policies (Details) $ in Thousands	Mar. 31, 2016 USD ($) customer segment shares	Mar. 31, 2015 USD ($) customer	Dec. 31, 2015 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Total of realized and unrealized transaction losses	$ 800
Total of realized and unrealized transaction gains		$ 1,100
Marketable securities	7,421		$ 11,407
Accrued rent	5,000	5,000
Accrued rent, noncurrent	4,500	4,500
Accrued rent, current	500	$ 500
Aggregate gross selling price of shipments	$ 28,400
Number of operating segments \| segment	1
Geographic concentration risk
Schedule Of Significant Accounting Policies [Line Items]
Long-lived assets	$ 1,400		$ 1,400
Net product revenue \| Customer concentration risk
Schedule Of Significant Accounting Policies [Line Items]
Number of customers accounting for more than ten percent of net revenue \| customer	1	1
Concentration risk, percentage	74.00%	77.00%
Net product revenue \| Geographic concentration risk
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	26.00%	22.00%
Net product revenue \| Geographic concentration risk \| Germany
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	9.00%	10.00%
Accounts receivable \| Customer concentration risk
Schedule Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	67.00%	73.00%
Number of customers accounting for more than ten percent of accounts receivable \| customer	1
Other current liabilities
Schedule Of Significant Accounting Policies [Line Items]
Amount received from shipment	$ 26,700
REGENXBIO, Inc. \| Common Stock
Schedule Of Significant Accounting Policies [Line Items]
Marketable securities (in shares) \| shares	687,139
REGENXBIO, Inc. \| Common Stock \| Level 1
Schedule Of Significant Accounting Policies [Line Items]
Marketable securities, unrealized loss	$ 4,000