Quarterly Results of Operations (Unaudited) - 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 |
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| Quarterly Financial Information Disclosure [Abstract] | ||||||||||
| Net revenues | $ 12,381 | $ 11,387 | $ 10,460 | $ 9,615 | $ 8,426 | $ 7,522 | $ 6,558 | $ 5,784 | $ 43,843 | $ 28,290 |
| Gross profit | $ 10,798 | $ 9,913 | $ 9,084 | $ 8,343 | $ 7,267 | $ 6,485 | $ 5,647 | $ 4,964 | 38,138 | 24,363 |
| Gross margin | 87.20% | 87.10% | 86.80% | 86.80% | 86.20% | 86.20% | 86.10% | 85.80% | ||
| Loss from operations | $ (11,256) | $ (10,449) | $ (6,509) | $ (7,878) | (36,092) | (25,141) | ||||
| Loss from continuing operations | $ (5,577) | $ (5,634) | $ (6,310) | $ (6,180) | (33,793) | (23,701) | ||||
| Income from discontinued operations | 429 | 429 | ||||||||
| Net loss | $ (11,080) | $ (10,329) | $ (6,349) | $ (6,035) | $ (5,577) | $ (5,205) | $ (6,310) | $ (6,180) | $ (33,793) | $ (23,272) |
| Basic and diluted net loss per share | $ (0.62) | $ (0.58) | $ (0.35) | $ (0.39) | $ (0.37) | $ (0.34) | $ (0.42) | $ (0.41) | $ (1.96) | $ (1.54) |
| Weighted average shares outstanding - basic and diluted | 17,890 | 17,890 | 17,890 | 15,364 | 15,168 | 15,161 | 15,157 | 15,153 | 17,259 | 15,160 |
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- Definition Percentage of gross margin. No definition available.
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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or 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/2009/role/commonPracticeRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). No definition available.
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