XML 64 R55.htm IDEA: XBRL DOCUMENT v3.10.0.1
Net Loss Per Share (Schedule of Computation of Basic and Diluted Net Income Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Earnings Per Share [Abstract]                      
Net loss $ 28,028 $ (2,176) $ (1,506) $ 1,080 $ (3,844) $ 3,448 $ 1,495 $ (795) $ 25,426 [1],[2],[3] $ 304 [1],[2],[3] $ 3,964 [1],[2],[3]
Net weighted-average number of common stock shares outstanding [1]                 18,512 18,272 18,008
Net income per share-basic (in usd per share) $ 1.50 $ (0.12) $ (0.08) $ 0.06 $ (0.21) $ 0.19 $ 0.08 $ (0.04) $ 1.37 [1] $ 0.02 [1] $ 0.22 [1]
Weighted average number of options                 535 42 78
Total common stock shares used in per share calculation [1]                 19,047 18,314 18,086
Net income per share-diluted (in usd per share) $ 1.47 $ (0.12) $ (0.08) $ 0.06 $ (0.21) $ 0.19 $ 0.08 $ (0.04) $ 1.33 [1] $ 0.02 [1] $ 0.22 [1]
[1] As adjusted for the adoption of ASC 606 using the full retrospective method
[2] As adjusted for the adoption of ASC 606 using the full retrospective method
[3] As adjusted for the adoption of ASC 606 using the full retrospective method