v2.4.1.9

Net Income (Loss) Per Share - Computation of Basic and Diluted Net Income (Loss) Share (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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

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