Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Detail)

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Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]                      
Total Revenue $ 76,475 $ 69,097 $ 67,746 $ 63,423 $ 61,422 $ 59,137 $ 62,264 $ 57,428 $ 276,741 $ 240,251 $ 231,808
Gross Profit 37,111 32,321 30,530 27,303 26,762 24,895 27,352 22,948 127,265 101,956 98,104
Net income (loss) 353 2,023 (380) 644 4,549 (4,264) 483 (1,165) 2,640 (396) (6,142)
Deemed dividends on preferred stock and amortization of preferred stock beneficial conversion feature and gain on redemption of preferred stock 0 0 (6,304) 2,856 2,691 2,651 2,639 2,566 (3,448) 10,547  
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS $ 353 $ 2,023 $ 5,924 $ (2,212) $ 1,858 $ (6,915) $ (2,156) $ (3,731) $ 6,088 $ (10,943) $ (30,816)
Earnings Per Share, Basic and Diluted [Abstract]                      
Basic (in dollars per share) $ 0.00 $ 0.02 $ 0.07 $ (0.03) $ 0.02 $ (0.09) $ (0.03) $ (0.05) $ 0.07 $ (0.14) $ (0.40)
Diluted (in dollars per share) $ 0.00 $ 0.02 $ 0.07 $ (0.03) $ 0.02 $ (0.09) $ (0.03) $ (0.05) $ 0.07 $ (0.14) $ (0.40)
Basic weighted average common shares outstanding 93,270 87,253 81,017 80,507 86,676 79,617 79,413 78,650 85,618 79,426 77,542
Diluted (in dollars per share) 96,874 90,899 90,168 80,507 88,611 79,617 79,413 78,650 91,568 79,426 77,542