Equity (Details Textual) - USD ($) |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2019 |
Oct. 18, 2018 |
Mar. 31, 2018 |
Sep. 30, 2013 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2013 |
Nov. 08, 2018 |
|
| Equity (Textual) | ||||||||||||
| Sales of common stock, shares | 42,900,000 | 30,200,000 | 2,800,000 | |||||||||
| Stock based compensation expense | $ 8,000 | $ 33,000 | ||||||||||
| Net proceeds on sale of common stock | $ 15,100,000 | $ 13,800,000 | $ 800,000 | |||||||||
| Common shares for consulting services, shares | 400,000 | |||||||||||
| Net proceeds on exercise of warrants | $ 1,503,762 | $ 4,849 | ||||||||||
| Description of shares | The Company sold 42.9 million shares of common stock at an offering price of $0.385 per share and warrants to purchase up to 42.9 million shares of common stock at an exercise price of $0.50 per share and with a term of 5 years, resulting in gross proceeds of $16.5 million and net proceeds of $15.1 million after deducting underwriting and other offering expenses. | In March 2018, the Company sold an aggregate of 30.2 million units consisting of an aggregate of 30.2 million shares of common stock, 7.6 million series A warrants and 22.7 million series B warrants, with each series A warrant exercisable for one share of common stock at an exercise price of $0.60 per share and each series B warrant exercisable for one share of common stock at an exercise price of $0.70 per share. During 2019, holders of 2.5 million Series A warrants exercised their warrants and received 2.5 million common shares. The remaining 5.1 million series A warrants expired in March 2019. | ||||||||||
| Increase in shares | 1,000,000,000 | |||||||||||
| Stock option plan, description | The 2019 Stock Plan as authorized, if implemented, would have 10.0 million shares to be issued. As of the date of this report, the 2019 Stock Plan has not been implemented. | |||||||||||
| Employee Stock Option [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock option granted | 3,600,000 | |||||||||||
| Stock option, description | The options have an aggregated fair value of $1.7 million that was calculated using the Black-Scholes option-pricing model. Variables used in the Black-Scholes option-pricing model include: (1) discount rate range from 2.34% to 2.99% (2) expected life of 6 years, (3) expected volatility range from 78.8% to 80.4%, and (4) zero expected dividends. | |||||||||||
| Stock options, vesting period | 10 years | |||||||||||
| Restricted Stock [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock based compensation expense | $ 100,000 | $ 100,000 | ||||||||||
| Number of additional shares granted | 400,000 | |||||||||||
| Restricted common shares granted vested | 400,000 | 108,000 | ||||||||||
| Restricted common shares granted, value | $ 100,000 | $ 72,000 | ||||||||||
| Restricted common shares granted fully vested | 156,000 | 81,000 | ||||||||||
| Yet to issue common shares for restricted shares vested | 300,000 | |||||||||||
| Minimum [Member] | Employee Stock Option [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock options, vesting period | 4 years 2 months 12 days | |||||||||||
| Stock option exercise price | 0.344 | |||||||||||
| Maximum [Member] | Employee Stock Option [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock options, vesting period | 4 years | |||||||||||
| Stock option exercise price | 0.7829 | |||||||||||
| 2013 Stock Plan [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Number of additional shares authorized | 22,750,000 | 17,750,000 | 12,750,000 | 9,250,000 | 1,000,000 | |||||||
| 2013 Stock Plan [Member] | Employees, directors and consultants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Total number of shares of common stock available for grant | 450,000 | |||||||||||
| Plan expiration date | Sep. 09, 2023 | |||||||||||
| 2013 Equity Incentive Plan [Member] | Employees, directors and consultants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Total number of shares of common stock available for grant | 2,750,000 | |||||||||||
| Plan expiration date | Sep. 09, 2023 | |||||||||||
| Common Stock [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Sales of common stock, shares | 30,200,000 | |||||||||||
| Stock Options [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock option granted | 5,800,000 | |||||||||||
| Option exercise price minimum | $ 0.2146 | |||||||||||
| Option exercise price maximum | $ 0.58 | |||||||||||
| Stock option, description | The options have an aggregated fair value of $1.1 million that was calculated using the Black-Scholes option-pricing model. Variables used in the Black-Scholes option-pricing model include: (1) discount rate range from 1.38% to 2.6% (2) expected life of 6 years, (3) expected volatility range from 78.5% to 81.8%, and (4) zero expected dividends. | |||||||||||
| Options to purchase common shares, cancelled | 1,700,000 | 1,500,000 | ||||||||||
| Total option expense | $ 1,200,000 | $ 1,700,000 | ||||||||||
| Unrecognized compensation expense | $ 2,100,000 | |||||||||||
| Number of stock options canceled | 1,684,300 | 1,515,650 | ||||||||||
| Number of stock options granted | 5,833,500 | 3,577,159 | ||||||||||
| Stock options, term | 8 years 22 days | |||||||||||
| Weighted average remaining contractual term | 7 years 11 months 19 days | 7 years 11 months 12 days | ||||||||||
| Stock Options [Member] | Minimum [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock options, vesting period | 4 years | |||||||||||
| Stock Options [Member] | Maximum [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Stock options, vesting period | 4 years 2 months 12 days | |||||||||||
| Warrant [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Fair value of warrants | $ 27,000 | |||||||||||
| Lincoln Park Capital Fund, LLC [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Description of purchase agreement and registration rights agreement | As often as every business day from and after one business day following the date of the initial purchase and over the 30-month term of the agreement, and up to an aggregate amount of an additional $30.0 million of shares of common stock, (subject to certain limitations), the Company has the right, from time to time, at its sole discretion and subject to certain conditions, to direct Lincoln Park to purchase up to 400 thousand shares of common stock, with such amount increasing as the closing sale price of the common stock increases; provided Lincoln Park's obligation under any single such purchase will not exceed $1.5 million, unless the Company and Lincoln Park mutually agree to increase the maximum amount of such single purchase (each, a "Regular Purchase"). If the Company directs Lincoln Park to purchase the maximum number of shares of common stock it then may sell in a Regular Purchase, then in addition to such Regular Purchase, and subject to certain conditions and limitations in the agreement, the Company may direct Lincoln Park in an "accelerated purchase" to purchase an additional amount of common stock that may not exceed the lesser of (i) 300% the number of shares purchased pursuant to the corresponding Regular Purchase or (ii) 30% of the total number of shares of the Company's common stock traded during a specified period on the applicable purchase date as set forth in the agreement. Under certain circumstances and in accordance with the agreement, the Company may direct Lincoln Park to purchase shares in multiple accelerated purchases on the same trading day. | |||||||||||
| Received amount | $ 2,500,000 | $ 100,000 | $ 700,000 | |||||||||
| Sales of common stock, shares | 3,400,000 | 400,000 | 1,000,000 | |||||||||
| Aggregate shares of common stock value | $ 32,500,000 | |||||||||||
| Issued shares of common stock | 900,000 | |||||||||||
| Fair value of market price | $ 600,000 | |||||||||||
| Warrants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Description of warrants | The transaction date relative fair value of the April 2019 warrants of $5.3 million was determined utilizing the Black-Scholes option pricing model and variables of (1) a discount rate of 2.35%, (2) expected term of 5 years, (3) expected volatility of 78% and (4) zero expected dividends. | The Company has outstanding warrants to purchase 57 thousand shares that include down-round protection. For warrants with down-round protection, a deemed dividend is recorded for the change in fair value of the warrants when the down-round provision is triggered. As result of the April 2019 offering, the exercise price of the warrant was reset from $1.25 per share to $0.88 per share. The down-round protection provision in the above warrants created a deemed dividend to common stockholders of $1,269, which is reflected in the accompanying consolidated statement of operations and consolidated statement of changes in stockholders’ equity. | ||||||||||
| Warrants [Member] | Chairman [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Warrants issued | 353,023 | |||||||||||
| Warrants [Member] | Mr. Sandesh Seth [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Warrants issued | 375,556 | |||||||||||
| Warrants [Member] | Chief Executive Officer [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Warrants issued | 721,068 | |||||||||||
| Warrants [Member] | Consultants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Number of warrants granted | 123,000 | |||||||||||
| Warrants [Member] | Consultants [Member] | Minimum [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Fair value assumptions, expected life | 4 years | |||||||||||
| Fair value assumptions, expected discount rate | 2.34% | |||||||||||
| Fair value assumptions, expected volatility rate | 77.01% | |||||||||||
| Warrants, vesting period | 4 years | |||||||||||
| Warrants exercise price | $ .36 | |||||||||||
| Warrants [Member] | Consultants [Member] | Maximum [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Fair value assumptions, expected life | 5 years | |||||||||||
| Fair value assumptions, expected discount rate | 2.99% | |||||||||||
| Fair value assumptions, expected volatility rate | 79.00% | |||||||||||
| Warrants, vesting period | 5 years | |||||||||||
| Warrants exercise price | $ .80 | |||||||||||
| Series A warrants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Sales of common stock, shares | 30,200,000 | |||||||||||
| Warrants exercised by warrant holders | 2,500,000 | |||||||||||
| Aggregate series warrants | 7,600,000 | 7,600,000 | ||||||||||
| Warrants exercised, shares | 2,500,000 | |||||||||||
| Warrant expired | 5,000,000 | |||||||||||
| Series B warrants [Member] | ||||||||||||
| Equity (Textual) | ||||||||||||
| Description of warrant exercisable | Each series B warrant exercisable for one share of Common Stock at an exercise price of $0.70 per share. | |||||||||||
| Aggregate series warrants | 22,700,000 | 22,700,000 | ||||||||||