v3.20.2
Stockholders' Equity (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Mar. 09, 2018
Jul. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Stockholders' Equity (Details) [Line Items]              
Common stock, par value (in Dollars per share)     $ 0.001   $ 0.001   $ 0.001
Common stock proceeds (in Dollars)         $ 3,045,730 $ 15,234,529  
Common Stock, Shares, Issued     31,348,171   31,348,171   25,665,350
Stock issued in connection with ATM sale of common stock, net (in Dollars)     $ 622,817   $ 3,045,730 $ 15,234,529  
Proceeds from stock options exercised (in Dollars)         $ 0    
Preferred stock, shares authorized     2,000,000 2,000,000 2,000,000 2,000,000 2,000,000
Preferred stock, par value (in Dollars per share)     $ 0.001   $ 0.001   $ 0.001
stock options granted         1,086,984    
Weighted Average Exercise Price (in Dollars per share)     $ 7.23   $ 7.23   $ 8.98
Exchange agreement, description         During the three and nine months ended September 30, 2020, total compensation expense for stock options issued to employees, directors, officers and consultants was $611,000 and $1,973,000, respectively, and $519,000 and $1,835,000 for the three and nine months ended September 30, 2019, respectively.     
Unrecognized compensation expense (in Dollars)     $ 3,719,000   $ 3,719,000    
Weighted average remaining contractual life         1 year 8 months 12 days    
Dividend yield         0.00%    
Weighted average remaining contractual life         6 years 9 months 18 days    
Employees [Member]              
Stockholders' Equity (Details) [Line Items]              
Expected term (years)         5 years    
non-employees [Member]              
Stockholders' Equity (Details) [Line Items]              
Expected term (years)         10 years    
Common Stock [Member]              
Stockholders' Equity (Details) [Line Items]              
New ATM agreement, description The Company is a party to a sales agreement with B. Riley dated March 9, 2018 for the sale of up to $14.7 million of the Company’s common stock under the Company’s ATM program, pursuant to a registration statement filed on March 9, 2018 for an aggregate of $70.0 million of the Company’s securities, which became effective on April 16, 2018. In November 2018, the ATM program amount was increased by $25.0 million. Under the ATM program, the Company may issue and sell common stock from time to time through B. Riley acting as agent, subject to limitations imposed by the Company and subject to B. Riley’s acceptance, such as the number or dollar amount of shares registered under the registration statement to which the offering relates. B. Riley is entitled to a commission of up to 3% of the gross proceeds from the sale of common stock sold under the ATM program. On August 31, 2020, the Company filed a prospectus supplement which allocated to the ATM program the remaining balance of its current shelf registration statement of approximately $7.3 million. The $7.3 million under the prospectus supplement, plus the $2.1 million already available under the ATM program, resulted in a total of approximately $9.4 million available to be sold under the Company’s ATM program. At September 30, 2020, the Company has approximately $8.7 million available under its ATM program (see Note 7 for subsequent event sales under the ATM program).             
Stock issued in connection with ATM sale of common stock, net     109,577   477,721 1,768,012  
Stock issued in connection with ATM sale of common stock, net (in Dollars)     $ 110   $ 478 $ 1,768  
Stock issued in connection with warrants exercised         91,500 1,944,707  
Stock issued in connection with stock options exercised       750   36,590  
Warrant [Member]              
Stockholders' Equity (Details) [Line Items]              
Stock issued in connection with warrants exercised         91,500 1,944,707  
Weighted Average Exercise Price (in Dollars per share)     $ 4.96   $ 4.96    
Value of stock issued in connection with upon exercise of warrants (in Dollars)         $ 412,000 $ 8,658,000  
Outstanding warrants         183,148    
Weighted average remaining contractual life         1 year 10 months 9 days    
Options Held [Member]              
Stockholders' Equity (Details) [Line Items]              
Weighted Average Exercise Price (in Dollars per share)     $ 5.11   $ 5.11    
Restricted Stock Units (RSUs) [Member] | Common Stock [Member]              
Stockholders' Equity (Details) [Line Items]              
Issuance of vested restricted stock         2,490    
Restricted Stock [Member]              
Stockholders' Equity (Details) [Line Items]              
Compensation expense (in Dollars)     $ 400 $ 52,000 $ 11,000 $ 151,000  
B. Riley [Member]              
Stockholders' Equity (Details) [Line Items]              
Common stock sale of amount (in Dollars) $ 14,700,000            
Rate Of commission         3.00%    
Amount of remaining balance of current shelf registration statement (in Dollars)         $ 7,300,000    
underwriters [Member]              
Stockholders' Equity (Details) [Line Items]              
Common Stock, Shares, Issued   5,111,110          
Common Stock, Shares, Issued   666,666          
ATM [Member] | Common Stock [Member]              
Stockholders' Equity (Details) [Line Items]              
Stock issued in connection with ATM sale of common stock, net         477,721 1,768,012  
Stock issued in connection with ATM sale of common stock, net (in Dollars)         $ 3,000,000.0 $ 15,200,000  
Common Stock [Member]              
Stockholders' Equity (Details) [Line Items]              
Common stock, par value (in Dollars per share)   $ 0.001          
Common stock proceeds (in Dollars)   $ 21,300,000          
Sale of Stock, Price Per Share (in Dollars per share)   $ 4.50          
Issuance of vested restricted stock         2,490 19,425  
Stock issued in connection with stock options exercised           36,590  
Net proceeds exercise of stock options (in Dollars)           $ 117,000