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Income Taxes - Schedule of Reconciliation of Income Tax Provision to Statutory Federal Income Tax Rate (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract] |  |  |
Income taxes at statutory rates | $ 396,760 | $ 1,272,242 | $ (91,705)
State income tax, net of federal benefit | 3,910 | 2,054 | 411
Permanent items | (5,060) | 68,944 | 32,530
Meals and entertainment | 74,755 | 54,375 | 40,796
Equity based compensation | (645,512) | 48,385 | 98,637
Warrant liability |  | (156,498) | (34,160)
Corporate tax rate change - impact on deferred income taxes | 2,768,458 |  |
Research and development credit | 206,801 | (141,494) | 628,573
Federal NOL adjustment | (386,441) | (206,133) |
Federal return to provision | 53,265 | 11,104 |
Other federal credits | 112,262 |  |
Other | 15,695 |  |
Change in federal valuation allowance | (2,569,208) | (944,798) | (674,460)
Total tax provision | $ 25,685 | $ 8,181 | $ 622

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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