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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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9 Months Ended | |||
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 17, 2014
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Dec. 31, 2013
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| Accounting Policies [Line Items] | ||||
| Gain (Loss) on Sale of Assets and Asset Impairment Charges | $ 400,000 | |||
| Long-term Investments, Total | 250,000 | 250,000 | 0 | |
| Stockholders’ Equity: | 52,000 | 0 | ||
| Restricted Cash and Cash Equivalents | 15,400,000 | |||
| Ownership percentage by parent | 100.00% | |||
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Subsequent Event [Member]
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| Accounting Policies [Line Items] | ||||
| Restricted Cash and Cash Equivalents | 1,400,000 | |||
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Hercules Note Payble [Member]
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| Accounting Policies [Line Items] | ||||
| Debt Instrument, Periodic Payment | 14,000,000 | |||
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Stock Option [Member]
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| Accounting Policies [Line Items] | ||||
| Stockholders’ Equity: | $ 293,000 | |||
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Argus Neurooptics LLC [Member]
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| Accounting Policies [Line Items] | ||||
| Ownership percentage by parent | 35.00% |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of the required periodic payments including both interest and principal payments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. No definition available.
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| X | ||||||||||
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- Definition
The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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