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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Summary of Recognized Liabilities Carried at Fair Value on Recurring Basis | The following table provides a summary of the recognized liabilities carried at fair value on a recurring basis:
|  | Balance as of December 31, 2016 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Warrant liability (note 10) |  | $ | — |  |  |  | — |  |  | $ | — |
|  | Balance as of December 31, 2015 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Warrant liability (note 10) |  | $ | — |  |  |  | — |  |  | $ | 709,504 |
Rollforward of Level 3 Fair Value Measurements | The following table provides a rollforward of the Company’s Level 3 fair value measurements during the years ended December 31, 2016 and 2015:
|  | For the Year Ended December 31, |
|  | 2016 |  |  | 2015 |
Beginning balance |  | $ | 709,504 |  |  | $ | 809,974 |
Change in fair value of warrant liability |  |  | (460,289 | ) |  |  | (85,325 | )
Exercise and expiration of warrants |  |  | — |  |  |  | (15,145 | )
Conversion of warrants |  |  | (249,215 | ) |  |  | — |
Ending balance |  | $ | — |  |  | $ | 709,504 |
Summary of Computation of Net Income or Loss Per Share | The following table presents the computation of net income or loss per share:
|  | For the Year Ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | 3,733,707 |  |  | $ | (270,342 | ) |  | $ | 3,588,300 |
Accretion of dividends on preferred stock |  |  | (1,537,021 | ) |  |  | (2,444,954 | ) |  |  | (2,431,836 | )
Net income (loss) attributable to common stockholders - basic |  | $ | 2,196,686 |  |  | $ | (2,715,296 | ) |  | $ | 1,156,464 |
Accretion of dividends on preferred stock |  |  | 125,205 |  |  |  | — |  |  |  | — |
Adjustment for change in fair value of warrant liability |  |  | (460,289 | ) |  |  | (85,325 | ) |  |  | (2,747,570 | )
Net income (loss) attributable to common stockholders - diluted |  | $ | 1,861,602 |  |  | $ | (2,800,621 | ) |  | $ | (1,591,106 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 3,373,316 |  |  |  | 651,593 |  |  |  | 555,805 |
Diluted |  |  | 4,667,503 |  |  |  | 651,593 |  |  |  | 555,805 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.65 |  |  | $ | (4.17 | ) |  | $ | 2.08 |
Diluted |  | $ | 0.40 |  |  | $ | (4.30 | ) |  | $ | (2.86 | )
Summary of Potentially Dilutive Securities | Potentially dilutive securities not included in the calculation of diluted net loss per share because to do so would be anti-dilutive are as follows (in common stock equivalent shares):
| For the Year Ended December 31, |
| 2016 |  |  | 2015 |  |  | 2014 |
Preferred redeemable convertible stock and preferred convertible stock, including accumulated dividends |  | 2,406,894 |  |  |  | 4,891,205 |  |  |  | 4,653,197 |
Employee stock options |  | — |  |  |  | 756,692 |  |  |  | 504,550 |
Warrants outstanding |  | 51,003 |  |  |  | — |  |  |  | — |
Series G preferred stock warrants outstanding |  | — |  |  |  | 788,338 |  |  |  | 809,972 |
Total |  | 2,457,897 |  |  |  | 6,436,235 |  |  |  | 5,967,719 |

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- Definition Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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