Annual report pursuant to Section 13 and 15(d)

Net Income (Loss) Per Share - Summary of Basic and Diluted Earnings Per Share (Detail)

v2.4.1.9
Net Income (Loss) Per Share - Summary of Basic and Diluted Earnings Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
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 loss $ (2,362)us-gaap_NetIncomeLoss $ (3,205)us-gaap_NetIncomeLoss $ (612)us-gaap_NetIncomeLoss $ (862)us-gaap_NetIncomeLoss $ (2,647)us-gaap_NetIncomeLoss $ (4,882)us-gaap_NetIncomeLoss $ (2,904)us-gaap_NetIncomeLoss $ (2,300)us-gaap_NetIncomeLoss $ (7,041)us-gaap_NetIncomeLoss $ (12,733)us-gaap_NetIncomeLoss $ (13,252)us-gaap_NetIncomeLoss
Denominator:                      
Weighted average common shares outstanding-basic (shares)                 36,472us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 34,012us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 33,198us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive common stock equivalents (shares)                 0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Weighted average common shares outstanding-diluted (shares)                 36,472us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 34,012us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 33,198us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net loss per share:                      
Earnings Per Share, Basic $ (0.06)us-gaap_EarningsPerShareBasic $ (0.09)us-gaap_EarningsPerShareBasic $ (0.02)us-gaap_EarningsPerShareBasic $ (0.02)us-gaap_EarningsPerShareBasic $ (0.08)us-gaap_EarningsPerShareBasic $ (0.14)us-gaap_EarningsPerShareBasic $ (0.09)us-gaap_EarningsPerShareBasic $ (0.07)us-gaap_EarningsPerShareBasic $ (0.19)us-gaap_EarningsPerShareBasic $ (0.37)us-gaap_EarningsPerShareBasic $ (0.40)us-gaap_EarningsPerShareBasic
Earnings Per Share, Diluted $ (0.06)us-gaap_EarningsPerShareDiluted $ (0.09)us-gaap_EarningsPerShareDiluted $ (0.02)us-gaap_EarningsPerShareDiluted $ (0.02)us-gaap_EarningsPerShareDiluted $ (0.08)us-gaap_EarningsPerShareDiluted $ (0.14)us-gaap_EarningsPerShareDiluted $ (0.09)us-gaap_EarningsPerShareDiluted $ (0.07)us-gaap_EarningsPerShareDiluted $ (0.19)us-gaap_EarningsPerShareDiluted $ (0.37)us-gaap_EarningsPerShareDiluted $ (0.40)us-gaap_EarningsPerShareDiluted