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Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Share (Detail) (USD $)
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3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Numerator: | |||||||||||
| Net income (loss) | $ (5,000)us-gaap_NetIncomeLoss | $ 1,213,000us-gaap_NetIncomeLoss | $ 877,000us-gaap_NetIncomeLoss | $ (1,304,000)us-gaap_NetIncomeLoss | $ (562,000)us-gaap_NetIncomeLoss | $ (830,000)us-gaap_NetIncomeLoss | $ (802,000)us-gaap_NetIncomeLoss | $ (1,348,000)us-gaap_NetIncomeLoss | $ 781,000us-gaap_NetIncomeLoss | $ (3,542,000)us-gaap_NetIncomeLoss | $ (5,059,000)us-gaap_NetIncomeLoss |
| Add: interest expense related to subordinated convertible note | 364,000us-gaap_InterestOnConvertibleDebtNetOfTax | 0us-gaap_InterestOnConvertibleDebtNetOfTax | 0us-gaap_InterestOnConvertibleDebtNetOfTax | ||||||||
| Less: gain on change in fair value of derivative related to subordinated convertible note | 119,000us-gaap_DerivativeGainLossOnDerivativeNet | (118,000)us-gaap_DerivativeGainLossOnDerivativeNet | 0us-gaap_DerivativeGainLossOnDerivativeNet | 0us-gaap_DerivativeGainLossOnDerivativeNet | |||||||
| Less: gain on extinguishment of derivative related to subordinated convertible note | (120,000)us-gaap_GainsLossesOnExtinguishmentOfDebt | 0us-gaap_GainsLossesOnExtinguishmentOfDebt | 0us-gaap_GainsLossesOnExtinguishmentOfDebt | ||||||||
| Net income (loss) attributable to common stockholders | $ 907,000us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ (3,542,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ (5,059,000)us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | ||||||||
| Denominator: | |||||||||||
| Weighted-average shares used to compute basic net income (loss) per share attributable to common stockholders | 11,802,241us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 9,279,649us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,013,128us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,011,980us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 5,815,928us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,010,795us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 1,009,236us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | ||||
| Effect of potentially dilutive securities: | |||||||||||
| Shares of common stock subject to conversion from preferred stock | 2,972,051us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | 0us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | 0us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | ||||||||
| Shares of common stock subject to conversion from subordinated convertible note | 134,341us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities | 0us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities | 0us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities | ||||||||
| Shares of common stock subject to outstanding options | 360,681us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | ||||||||
| Weighted-average shares used to compute diluted net income (loss) per share attributable to common stockholders | 11,802,241us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 11,219,377us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 6,939,568us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,011,980us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 9,283,001us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,010,795us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 1,009,236us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | ||||
| Basic | $ 0.00us-gaap_EarningsPerShareBasic | $ 0.13us-gaap_EarningsPerShareBasic | $ 0.87us-gaap_EarningsPerShareBasic | $ (1.29)us-gaap_EarningsPerShareBasic | $ 0.13us-gaap_EarningsPerShareBasic | $ (3.50)us-gaap_EarningsPerShareBasic | $ (5.01)us-gaap_EarningsPerShareBasic | ||||
| Diluted | $ 0.00us-gaap_EarningsPerShareDiluted | $ 0.12us-gaap_EarningsPerShareDiluted | $ 0.13us-gaap_EarningsPerShareDiluted | $ (1.29)us-gaap_EarningsPerShareDiluted | $ 0.10us-gaap_EarningsPerShareDiluted | $ (3.50)us-gaap_EarningsPerShareDiluted | $ (5.01)us-gaap_EarningsPerShareDiluted | ||||
| X | ||||||||||
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- Definition
Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible preferred stock using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The after-tax amount of interest recognized in the period associated with any convertible debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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