Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock-Based Compensation (Details Narrative)

v3.19.1
Stockholders' Equity and Stock-Based Compensation (Details Narrative) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 06, 2017
Aug. 02, 2016
Aug. 31, 2018
May 31, 2018
Apr. 30, 2018
Mar. 30, 2018
Jan. 30, 2018
Mar. 31, 2019
Sep. 30, 2018
Dec. 31, 2018
Jul. 30, 2018
May 31, 2017
Mar. 25, 2015
Exercise price             $ 0.25            
Common stock, shares authorized               100,000,000   100,000,000      
Common stock, shares, outstanding               36,149,325   32,862,090      
Class of Warrant or Right, Outstanding               844,337   844,337      
Stock options outstanding               5,342,192   5,604,154      
Additional common shares                   100,753      
Total stock and stock equivalents outstanding               46,206,354   43,114,512      
Proceeds from the issuance of the warrants and common shares               $ 4,000,000          
Common stock, conversion basis               The Series B Preferred Stock was initially convertible into 2,666,667 shares of common stock.          
Preferred stock par value               $ 0.001   $ 0.001      
Common Stock, Shares Issued               36,149,325   32,862,090      
Number of options vested and expected to vest outstanding               3,673,176   3,935,138      
Unrecognized compensation costs               $ 300,000          
Weighted average recognition period               4 months 28 days          
Aggregate intrinsic value               $ 0   $ 0      
Series B Preferred Stock conversion description               The Company has the option of forcing the conversion of all or part of the Series B Preferred Stock if at any time the average closing price of the Company’sCompany’s common stock for a thirty-trading day period is greater than $5.4902 prior to August 2, 2019 or greater than $8.2353 at any time. The Company can only exercise this option if it also requires the conversion of the Series A Preferred Stock in the same proportion as it is requiring of the Series B Preferred Stock.          
Preferred stock convertible amount               $ 6,200,000          
2006 Stock Plan and 2015 Equity Incentive Plan [Member]                          
Stock options outstanding               5,342,192   5,604,154      
Options vested               3,673,176   3,935,138      
PIK dividend [Member]                          
Conversion price   $ 2.7451           $ 1.50          
Fair value per share   $ 3.315           $ 2.34          
Total cumulative deemed dividend               $ 200,000   $ 100,000      
Investment Bank [Member]                          
Monthly payments $ 15,000                        
Introductory fee in percentage 7.00%                        
Warrants fees in percentage 5.00%                        
Offering price term 3 years                        
2015 Equity Incentive Plan [Member]                          
Common shares issued under incentive plan       6,300,000                  
New ATM agreement [Member]                          
Proceeds from issuance of shares               $ 7,200,000          
Sale of stock, number of shares               6,400,000          
Convertible Series A Preferred Stock [Member]                          
Common stock, shares issued, conversion of preferred stock         124,882                
Preferred Stock, Shares Outstanding               813,624   813,624      
Additional common shares               165,239   148,403      
Accumulated dividend               $ 500,000   $ 400,000      
Common stock shares reserved for future issuance, Value               $ 813,624   $ 813,624      
Conversion price               $ 2.75          
Preferred stock, shares issued               813,624   813,624      
Preferred stock, liquidation preference               $ 2,687,077   $ 2,640,862      
Preferred stock convertible amount   $ 600,000                      
Accrued dividend               $ 453,597   $ 407,382      
Convertible Series B Preferred Stock [Member]                          
Class of Warrant or Right, Outstanding             666,664            
Preferred Stock, Shares Outstanding               2,666,667   2,666,667      
Additional common shares               224,970   175,237      
Rate of dividend payable in kind             7.00%            
Common stock shares reserved for future issuance, Value               $ 2,666,667   $ 2,666,667      
Proceeds from the issuance of the warrants and common shares               $ 3,700,000          
Price per share             $ 1.50            
Conversion price             $ 1.50            
Preferred stock, shares issued             2,666,667 2,666,667   2,666,667      
Preferred stock, liquidation preference               $ 4,337,455   $ 4,262,855      
Liquidation preference per share             $ 1.50            
Common stock exercise price             1.875            
Preferred stock convertible amount               3,600,000          
Accrued dividend               $ 337,456   262,856      
Long-Term Non-Qualified Options [Member] | Advisory board members[Member]                          
Non-qualified stock options granted               64,677          
Term of options               10 years          
Long-Term Non-Qualified Options [Member] | Chief Executive Officer [Member] | Advisory board members[Member]                          
Non-qualified stock options granted               1,409,248          
Long-Term Non-Qualified Options [Member] | Chief Executive Officer [Member] | Minimum [Member] | Advisory board members[Member]                          
Contractual lives               3 years          
Long-Term Non-Qualified Options [Member] | Chief Executive Officer [Member] | Maximum [Member] | Advisory board members[Member]                          
Contractual lives               10 years          
Long-Term Non-Qualified Options [Member] | Directors, Officers and Employees [Member] | Advisory board members[Member]                          
Non-qualified stock options granted               4,801,248          
Long-Term Non-Qualified Options [Member] | Directors, Officers and Employees [Member] | Minimum [Member] | Advisory board members[Member]                          
Exercise price               $ 0.9          
Contractual lives               1 month 6 days          
Term of options               5 years          
Long-Term Non-Qualified Options [Member] | Directors, Officers and Employees [Member] | Maximum [Member] | Advisory board members[Member]                          
Exercise price               $ 43.25          
Contractual lives               9 years 4 months 24 days          
Term of options               10 years          
Long-Term Non-Qualified Options [Member] | Director [Member]                          
Non-qualified stock options granted     212,528                    
Description of option vesting     The remaining approximately 212,528 stock options were service based options issued to the directors of the Company that vest over a one-year period on the anniversary date of the grant. All options granted have a 10-year contractual term                    
Long-Term Non-Qualified Options [Member] | Employees and Consultants [Member]                          
Non-qualified stock options granted     1,540,263                    
Description of option vesting     The service condition vests one-third annually over a 3-year period with accelerated vesting of these options occurring upon applicable performance or market conditions being satisfied by certain milestone dates                    
Long-Term Non-Qualified Options [Member] | Employees, Consultants and Directors [Member]                          
Non-qualified stock options granted     1,752,791                    
Strike price     $ 0.90                    
Description of option vesting     The service condition vests one-third annually over a 3-year period with accelerated vesting of these options occurring upon applicable performance or market conditions being satisfied by certain milestone dates                    
Description of Long-Term Non-Qualified Option Grants     In accordance with ASC 718, awards with service, market and performance conditions for the employees and consultants were assigned a fair value of $0.69 per share and the awards with service conditions for the directors of the Company were assigned a fair value of $0.70 per share (total value of $1.2 million). The value was determined using a Monte Carlo simulation Model                    
Description for accelerated vesting of options     The Company’s closing stock price is above $3 per share for 10 consecutive trading days by December 31, 2019, The Company secures at least $5 million of funding from the Department of Energy by June 30, 2019                    
Description for exercise of options     The weighted average years remaining of expected life was itself calculated based on a Monte Carlo simulation under which it was assumed that the options would be exercised, if vested, when the stock reached a price of $4.50, otherwise they would be exercised at expiration, if in the money                    
Consultants [Member] | Long-Term Non-Qualified Options [Member] | Advisory board members[Member]                          
Non-qualified stock options granted               476,267          
Consultants [Member] | Long-Term Non-Qualified Options [Member] | Advisory board members[Member] | Minimum [Member]                          
Exercise price               $ 0.9          
Term of options               3 years          
Consultants [Member] | Long-Term Non-Qualified Options [Member] | Advisory board members[Member] | Maximum [Member]                          
Exercise price               $ 43.25          
Term of options               10 years          
Holders of Series A Preferred Shares [Member]                          
Convertible preferred stock, shares converted         111,260       95,116        
Common stock, shares issued, conversion of preferred stock         124,882       110,530        
Shares issued against dividend                 729        
B. Riley FBR, Inc. [Member] | 2018 ATM agreement [Member]                          
Proceeds from issuance of shares               $ 2,000,000          
Sale of stock, number of shares               3,300,000          
Common stock authorized to be issued under prospectus supplement, value           $ 50,000,000              
B. Riley FBR, Inc. [Member] | March 28, 2019 and March 29, 2019 [Member] | 2018 ATM agreement [Member]                          
Proceeds from issuance of shares               $ 200,000          
Sale of stock, number of shares               300,000          
BCF [Member]                          
Accrete dividend   $ 2.7451           $ 0.84          
Additional deemed dividend   $ 0.5699                      
Preferred stock convertible amount   $ 2,800,000           $ 2,600,000          
BCF [Member] | PIK dividend [Member]                          
Total cumulative deemed dividend               100,000   $ 100,000      
General International Holdings, Inc [Member] | Convertible Series A Preferred Stock [Member]                          
Common stock, shares, outstanding   255,000                      
Rate of dividend payable in kind   7.00%                      
Number of shares reserved for future issuance   1,020,000                      
Common stock shares reserved for future issuance, Value   $ 2,800,000                      
Price per share   $ 2.75                      
Conversion price   2.7451                      
Fair value per share   3.315                      
Average market price of common stock   $ 3.315                      
Aggregate intrinsic value   $ 2,800,000                      
Preferred stock, shares issued   1,020,000                      
Preferred stock, liquidation preference per share   $ 2.7451                      
Preferred stock convertible amount   $ 3,400,000                      
ATM Agreement [Member] | B. Riley FBR, Inc. [Member]                          
Net proceeds to Company               20,700,000          
ATM Agreement [Member] | B. Riley FBR, Inc. [Member] | On January 24, 2018, January 26, 2018, February 7, 2018, and March 2, 2018 [Member]                          
Aggregate registration amount               22,600,000          
Stock Options and Restricted Stock [Member] | Plan [Member]                          
Common stock, shares authorized                         600,000
Common stock, shares authorized increased                       2,900,000 1,400,000
Warrants [Member]                          
Proceeds from the issuance of the warrants and common shares               300,000          
Warrants [Member] | Convertible Series B Preferred Stock [Member]                          
Exercise price             $ 1.50            
Number of shares reserved for future issuance                     133,432    
Maturity date             Jan. 30, 2021            
Convertible Series B Preferred Stock [Member]                          
Accumulated dividend               $ 187,000          
Price per share               $ 2.34          
Preferred stock, shares issued               2,666,667          
Preferred stock, liquidation preference               $ 4,300,000