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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Stock Repurchase Program
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Dec. 31, 2011
Stock Repurchase Program
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Aug. 10, 2010
Stock Repurchase Program
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Feb. 28, 2013
Subsequent Event
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Dec. 31, 2012
Consultant
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| Accounting Policies [Line Items] | ||||||||||||||||
| Depreciation expense | $ 377,000 | $ 565,000 | $ 940,000 | |||||||||||||
| Undelivered elements (primarily consists of training) | 1,723,000 | 1,105,000 | 1,723,000 | 1,105,000 | ||||||||||||
| Provision for sales returns | 110,000 | 110,000 | ||||||||||||||
| Extended warranty contracts | 1,506,000 | 1,056,000 | 1,506,000 | 1,056,000 | ||||||||||||
| Unrecognized deferred revenue | 3,000 | 25,000 | 3,000 | 25,000 | ||||||||||||
| License revenue | 0 | 64,000 | 145,000 | |||||||||||||
| Advertising costs | 907,000 | 444,000 | 610,000 | |||||||||||||
| Compensation cost related to stock options | 1,600,000 | 1,528,000 | 727,000 | |||||||||||||
| Net impact of share based compensation expense to earnings per diluted share | $ (0.05) | $ (0.05) | $ (0.03) | |||||||||||||
| Total unrecognized compensation cost | $ 1,900,000 | $ 2,600,000 | $ 1,900,000 | $ 2,600,000 | ||||||||||||
| Unrecognized share based compensation cost to be recognized over weighted-average period | 1 year 2 months 12 days | |||||||||||||||
| Option expiry Duration | 5 years | |||||||||||||||
| Outstanding stock options and warrants excluded from diluted loss per share | 4,713,000 | 4,626,000 | 4,282,000 | |||||||||||||
| Special stock dividends declared | 0.50% | 0.50% | 0.50% | 0.50% | ||||||||||||
| Shares issued part of quarterly stock dividends | 634,162 | 1,165,715 | ||||||||||||||
| Percentage of stock dividend | 1.00% | 1.00% | 1.00% | 1.00% | ||||||||||||
| Dividend declared, date of record | Dec. 14, 2012 | Sep. 14, 2012 | Jun. 08, 2012 | Mar. 15, 2012 | ||||||||||||
| Special stock dividends intended for the year ended 12/31/2013 | 2.00% | |||||||||||||||
| Number of shares authorized to repurchase | 2,000,000 | |||||||||||||||
| Total number of shares purchased | 133,365 | 100,500 | ||||||||||||||
| Average price paid per share | $ 1.73 | $ 2.68 | ||||||||||||||
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- Details
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| X | ||||||||||
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- Definition
Share-based compensation net impact on earning per share diluted. No definition available.
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| X | ||||||||||
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- Definition
Special stock dividends declared. No definition available.
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- Definition
Special stock dividends intended. No definition available.
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| X | ||||||||||
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- Definition
Amount of deferred revenue from sales of training, installation, product and support services expected to be earned within one year. No definition available.
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| X | ||||||||||
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- Definition
Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares of common stock issued as dividends during the period. Excludes stock splits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. No definition available.
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| X | ||||||||||
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- Definition
As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount as of the balance sheet date of the aggregate extended product warranty liability. Does not include the ending balance for the standard product warranty liability. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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- Definition
Total deduction from sales during the period arising from goods returned by customers (other than under warranty provisions) and price reductions (allowance, price protection agreements) given by the entity. Returns and allowances are a deduction from gross revenue in arriving at net revenue. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. No definition available.
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| X | ||||||||||
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- Definition
Total cost of shares repurchased divided by the total number of shares repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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