Summary of Significant Accounting Policies - Revenue Recognition (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($) product
Revenue Recognition
Sales return period prior to expiry date	6 months
Sales return period subsequent to expiry date	12 months
Number of commercial products \| product	2
Contract assets	$ 0
Contract liabilities	$ 0
Minimum
Revenue Recognition
Product shelf life	36 months
Maximum
Revenue Recognition
Product shelf life	48 months
License and collaboration agreements
Revenue Recognition
Guaranteed minimum amounts	$ 0
Royalty revenue agreements
Revenue Recognition
Guaranteed minimum amounts	$ 0

Minimum guaranteed amount owed to company from license and royalty revenue.

No definition available.

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- Definition

Represents the number of commercial products.

+ References

No definition available.

+ Details

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- Definition

Represents the period within which a product can be expired.

+ References

No definition available.

+ Details

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- Definition

Represents the period within which a product can be returned by the customers to the entity subsequent to the expiry date.

+ References

No definition available.

+ Details

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- Definition

Represents the period within which a product can be returned by the customers to the entity prior to the expiry date.

+ References

No definition available.

+ Details

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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