Subsequent Event	3 Months Ended
Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Event	Subsequent Events Private Placement On April 9, 2020, the Company entered into a securities purchase agreement with Lincoln Park Capital Fund, LLC (“LPC”), pursuant to which it sold to LPC, (i) in a registered direct offering, an aggregate of (a) 904,970 shares (the “Shares”) of common stock, par value $0.0001 per share (“Common Stock”) and (b) Series K pre-funded warrants (the “Series K Pre-Funded Warrants”) to purchase up to 255,000 shares (the “Series K Warrant Shares”) of the Company’s common stock, par value $0.0001 per share (the “Common Stock”), which will be exercisable immediately upon issuance for a period of five years after the date of issuance, and (ii) in a concurrent private placement, Series L warrants (the “Series L Warrants”) to purchase up to 1,159,970 shares (the “Series L Warrant Shares”) of Common Stock, for aggregate gross proceeds to the Company of approximately $1.084 million, before deducting estimated offering expenses payable by the Company. On April 28, 2020 LPC exercised 255,000 Series K Pre-Funded Warrants. Small Business Administration Payroll Protection Program Loan On April 15, 2020, the Company was granted a loan (the “Loan”) from JPMorgan Chase Bank, N.A. in the aggregate amount of $305,000, pursuant to the Paycheck Protection Program (the “PPP”) under Division A, Title I of the CARES Act. The Loan, which was in the form of a Note dated April 15, 2020 issued by the Company, matures on April 15, 2022 and bears interest at a rate of 0.98% per annum, payable monthly commencing on November 15, 2020. The Note may be prepaid by the Company at any time prior to maturity with no prepayment penalties. Funds from the Loan may only be used for payroll costs, rent, and utilities. The Company intends to use the entire Loan amount for qualifying expenses. Under the terms of the PPP, certain amounts of the Loan may be forgiven if they are used for qualifying expenses as described in the CARES Act. Amendment to 2014 Equity Incentive Plan On April 16, 2020 the 2014 Equity Incentive Plan was approved by the shareholders and amended to increase the number of shares of common stock reserved for issuance thereunder to 2,243,056 from 1,243,056. Exercise of Series I Pre-Funded Warrants On April 28, 2020 LPC exercised 131,967 Series I Pre-Funded Warrants.

Subsequent Events

Private Placement

On April 9, 2020, the Company entered into a securities purchase agreement with Lincoln Park Capital Fund, LLC (“LPC”), pursuant to which it sold to LPC, (i) in a registered direct offering, an aggregate of (a) 904,970 shares (the “Shares”) of common stock, par value $0.0001 per share (“Common Stock”) and (b) Series K pre-funded warrants (the “Series K Pre-Funded Warrants”) to purchase up to 255,000 shares (the “Series K Warrant Shares”) of the Company’s common stock, par value $0.0001 per share (the “Common Stock”), which will be exercisable immediately upon issuance for a period of five years after the date of issuance, and (ii) in a concurrent private placement, Series L warrants (the “Series L Warrants”) to purchase up to 1,159,970 shares (the “Series L Warrant Shares”) of Common Stock, for aggregate gross proceeds to the Company of approximately $1.084 million, before deducting estimated offering expenses payable by the Company.

On April 28, 2020 LPC exercised 255,000 Series K Pre-Funded Warrants.

Small Business Administration Payroll Protection Program Loan

On April 15, 2020, the Company was granted a loan (the “Loan”) from JPMorgan Chase Bank, N.A. in the aggregate amount of $305,000, pursuant to the Paycheck Protection Program (the “PPP”) under Division A, Title I of the CARES Act.

The Loan, which was in the form of a Note dated April 15, 2020 issued by the Company, matures on April 15, 2022 and bears interest at a rate of 0.98% per annum, payable monthly commencing on November 15, 2020. The Note may be prepaid by the Company at any time prior to maturity with no prepayment penalties. Funds from the Loan may only be used for payroll costs, rent, and utilities. The Company intends to use the entire Loan amount for qualifying expenses. Under the terms of the PPP, certain amounts of the Loan may be forgiven if they are used for qualifying expenses as described in the CARES Act.

Amendment to 2014 Equity Incentive Plan

On April 16, 2020 the 2014 Equity Incentive Plan was approved by the shareholders and amended to increase the number of shares of common stock reserved for issuance thereunder to 2,243,056 from 1,243,056.

Exercise of Series I Pre-Funded Warrants

On April 28, 2020 LPC exercised 131,967 Series I Pre-Funded Warrants.