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Stockholders' Equity | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Stockholders' Equity | Stockholders’ Equity At-the-Market Offering Program Effective June 2016, the Company entered into a sales agreement with respect to an at-the-market offering program (“ATM Agreement”) pursuant to which the Company may offer and sell, from time to time at its sole discretion, shares of its common stock, having an aggregate offering price of up to $5 million. The Company pays the sales agent a commission of 2.5% of the gross proceeds from the sale of such shares. Final proceeds from this ATM agreement were received in January 2018, and the ATM Agreement was terminated. Effective April 2017, the Company entered into the Purchase Agreement with Leviston for the purchase of up to $7.25 million of shares of the Company's common stock from time to time, at the Company's option. The Company is not obligated to make any sales of shares under the Purchase agreement, and if it elects to make any sales, the Company can set a minimum sales price for the shares. Following is a reconciliation of the transactions under the ATM Agreement and Purchase Agreement for the six-month periods ended June 30, 2018, and 2017, respectively:
| Six Months Ended |  | Six Months Ended
| June 30, 2018 |  | June 30, 2017
Number of shares sold | 6,429,299 |  |  | 3,292,161 |
Gross proceeds | $ | 1,795,860 |  |  | $ | 2,670,253 |
Fees | 52,842 |  |  | 74,821 |
Net proceeds | $ | 1,743,018 |  |  | $ | 2,595,432 |
Average price per share | $ | 0.28 |  |  | $ | 0.81 |
In February 2018, the Company issued 615,605 shares of Common Stock to Leviston in the amount of $0.2 million as payment for issuance fees due under the terms of the Purchase Agreement. In April 2017, the Company issued 777,936 shares of Common Stock to Leviston in the amount of $0.2 million as payment for issuance fees due under the terms of the Purchase Agreement. Excluded from gross proceeds for the six months ended June 30, 2017 above is $0.25 million of cash proceeds received on June 29, 2017, for which the corresponding 298,525 shares were not issued to the buyer until after June 30, 2017. The $0.25 million of cash proceeds are included in the Condensed Consolidated Statement of Cash Flows for the six months ended June 30, 2017 as proceeds from the issuance of common stock.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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