Summary of Product Revenue Allowances and Reserve Categories (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jun. 30, 2013	Mar. 31, 2013
Valuation Allowance [Line Items]
Beginning balance	$ 555
Provision	988	795
Payments or credits	(727)	(240)
Ending balance	816	555
Trade Allowances
Valuation Allowance [Line Items]
Beginning balance	146
Provision	341	276
Payments or credits	(279)	(130)
Ending balance	208	146
Rebates Chargebacks and Discounts
Valuation Allowance [Line Items]
Beginning balance	408
Provision	597	501
Payments or credits	(417)	(93)
Ending balance	588	408
Other Incentives
Valuation Allowance [Line Items]
Beginning balance	1
Provision	50	18
Payments or credits	(31)	(17)
Ending balance	$ 20	$ 1

Total of the provision for allowances and reserves in a given period, the valuation and qualifying accounts that are netted against gross revenue or that reflect a liability established to represent expected future costs.

No definition available.

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

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