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Commitments and Contingencies - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2014 USD ($) ft² | Dec. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2014 USD ($) | Mar. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) ft² Building | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jul. 31, 2011 USD ($) ft² | Mar. 31, 2008 ft² | Mar. 31, 2007 ft² | Mar. 31, 2001 ft²
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, term | 8 years 1 month |  |  |  |  |  |  |  |  |  |  |  | 11 years | 2 years | 5 years | 10 years
Lease agreement, space | ft² |  |  |  |  |  |  |  |  |  | 45,000 |  |  | 55,694 | 7,350 | 2,500 | 25,000
Lease agreement, expiration date |  |  |  |  |  |  |  |  |  |  |  |  | May 31, 2023 |  |  |
Lease agreement, letter of credit issued |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000 |  |  |
Lease agreement, commencement date | Aug. 01, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Future minimum rental commitment, 2016 |  | $ 2,343,000 |  |  |  |  |  |  |  | $ 2,343,000 |  |  |  |  |  |
Future minimum rental commitment, 2017 |  | 1,888,000 |  |  |  |  |  |  |  | 1,888,000 |  |  |  |  |  |
Future minimum rental commitment, 2018 |  | 1,434,000 |  |  |  |  |  |  |  | 1,434,000 |  |  |  |  |  |
Future minimum rental commitment, 2019 |  | 1,418,000 |  |  |  |  |  |  |  | 1,418,000 |  |  |  |  |  |
Future minimum rental commitment, 2020 |  | 1,371,000 |  |  |  |  |  |  |  | $ 1,371,000 |  |  |  |  |  |
Lease termination description |  |  |  |  |  |  |  |  |  | The Company terminated the lease on the 7,350 square feet of space in the first quarter of 2015. |  |  |  |  |  |
Lease agreement, number buildings leased | Building |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |
Operating leases, rent expense |  |  |  |  |  |  |  |  |  | $ 2,619,000 | $ 2,735,000 | $ 2,437,000 |  |  |  |
Operating leases, deferred rent liabilities |  | 1,899,000 |  |  |  | $ 1,956,000 |  |  |  | 1,899,000 | 1,956,000 | 2,028,000 |  |  |  |
Research and development expenses |  | 1,431,000 | $ 1,490,000 | $ 1,252,000 | $ 1,568,000 | $ 1,328,000 | $ 1,650,000 | $ 1,430,000 | $ 1,201,000 | 5,740,000 | 5,609,000 | 7,341,000 |  |  |  |
Purchase orders, supply agreements and other contractual obligations |  | 5,729,000 |  |  |  |  |  |  |  | 5,729,000 |  |  |  |  |  |
Licensing Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research and development expenses |  |  |  |  |  |  |  |  |  | $ 7,000 | $ 7,000 | $ 302,000 |  |  |  |
Lease for three buildings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, space | ft² |  |  |  |  |  |  |  |  |  | 41,000 |  |  |  |  |  |
Lease agreement, expiration date |  |  |  |  |  |  |  |  |  | Jun. 30, 2017 |  |  |  |  |  |
Lease for the fourth building |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, space | ft² |  |  |  |  |  |  |  |  |  | 4,000 |  |  |  |  |  |
Lease agreement, expiration date |  |  |  |  |  |  |  |  |  | Sep. 30, 2019 |  |  |  |  |  |
Before Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, space | ft² | 55,694 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Security deposit | $ 200,000 |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |
After Amendment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, space | ft² | 75,594 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Security deposit | $ 450,000 |  |  |  |  |  |  |  | $ 450,000 |  |  |  |  |  |  |
Future minimum rental commitment, 2016 |  | 1,371,000 |  |  |  |  |  |  |  | $ 1,371,000 |  |  |  |  |  |
Future minimum rental commitment, 2017 |  | 1,371,000 |  |  |  |  |  |  |  | 1,371,000 |  |  |  |  |  |
Future minimum rental commitment, 2018 |  | 1,371,000 |  |  |  |  |  |  |  | 1,371,000 |  |  |  |  |  |
Future minimum rental commitment, 2019 |  | 1,371,000 |  |  |  |  |  |  |  | 1,371,000 |  |  |  |  |  |
Future minimum rental commitment, 2020 |  | $ 1,371,000 |  |  |  |  |  |  |  | $ 1,371,000 |  |  |  |  |  |
Expansion Space |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement, space | ft² | 19,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent expense | $ 361,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Current Liabilities -URI http://asc.fasb.org/extlink&oid=6509677 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6911-107765 + Details
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- Definition This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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