Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Note 6 Stock Based Compensation Private Placement On August 9, 2016, the Company entered into a securities purchase agreement with Ascend Legend Master Fund, Ltd., pursuant to which the Company agreed to sell to Ascend Legend Master Fund, Ltd. 1,618,123 12.36 1,618,123 23.00 Equity Incentive Plans 2013 Equity Incentive Plan In December 2013 the Company’s board and stockholders approved the “2013 Equity Incentive Plan”, providing for the issuance of equity based instruments covering up to an initial total of 1,042,167 Effective on March 10, 2014, the Company’s board of directors and stockholders approved the First Amendment to the 2013 Equity Incentive Plan which provided for an increase in the aggregate number of shares of common stock that may be issued pursuant to the Plan to equal 18% of the total number of shares of common stock outstanding immediately following the completion of the IPO (assuming for this purpose the issuance of all shares issuable under the Company’s equity plans, the conversion into common stock of all outstanding securities that are convertible by their terms into common stock and the exercise of all options and warrants exercisable for shares of common stock and including shares and warrants issued to the underwriters for such IPO upon exercise of its over-allotment options). Effective March 27, 2014, the aggregate total shares which may be issued under the 2013 Equity Incentive Plan were increased to 2,335,967 Effective on May 19, 2016, the Company’s stockholders approved the amendment and restatement of the 2013 Equity Incentive Plan to increase the number of shares reserved for issuance thereunder by 2,150,000 4,485,967 As of September 30, 2016, 2,421,782 2014 Non-Employee Equity Compensation Plan On March 6, 2014, the Company’s board of directors and stockholders approved the 2014 Non-Employee Equity Compensation Plan for the issuance of equity-based instruments covering up to 250,000 Effective on May 19, 2016, the Company’s stockholders approved the amendment and restatement of the 2014 Equity Incentive Plan to increase the number of shares reserved for issuance thereunder by 350,000 600,000 As of September 30, 2016, 349,899 2015 Performance Share Unit Plan On April 10, 2015, the Company’s board of directors approved the Energous Corporation 2015 Performance Share Unit Plan (the “Performance Share Plan”), under which 1,310,104 As of September 30, 2016, 31,951 Employee Stock Purchase Plan On April 10, 2015, the Company’s board of directors approved the ESPP, under which 600,000 As of September 30, 2016, 506,292 194,325 Stock Option Award Activity Number of Weighted Weighted Intrinsic Outstanding at January 1, 2016 1,487,785 $ 4.43 8.0 $ 5,310,340 Granted - - - - Exercised (106,441) 2.54 - - Forfeited (47,987) 2.44 - - Outstanding at September 30, 2016 1,333,357 $ 4.55 7.4 $ 20,079,293 Exercisable at January 1, 2016 860,970 $ 4.34 8.0 $ 3,076,767 Vested 248,936 4.45 - - Exercised (106,441) 2.54 - - Forfeited (1,932) 2.49 - - Exercisable at September 30, 2016 1,001,533 $ 4.56 7.4 $ 15,074,220 As of September 30, 2016, the unamortized value of options was $ 846,248 1.0 Restricted Stock Units (“RSUs”) On January 4, 2016, the compensation committee of the board of directors granted to various directors, RSUs under which the holders have the right to receive an aggregate of 26,916 On January 4, 2016, the compensation committee of the board of directors granted to John Gaulding, director and chairman of the board, RSUs under the 2014 Non-Employee Equity Compensation Plan for which Mr. Gaulding has the right to receive 25,000 On February 25, 2016, the compensation committee of the board of directors granted certain employees inducement RSU awards under which the holders have the right to receive an aggregate 38,000 On March 4, 2016, the compensation committee of the board of directors granted an employee inducement RSU awards under which the holder has the right to receive an aggregate of 12,500 On May 19, 2016, the compensation committee of the board of directors granted certain employees inducement RSU awards under which the holders have the right to receive an aggregate of 126,000 On May 19, 2016, the compensation committee of the board of directors granted a consultant an RSU award under the 2013 Equity Incentive Plan for which the holder has the right to receive an aggregate of 3,250 On June 10, 2016, the board of directors granted non-employee directors RSU awards under the 2014 Non-Employee Equity Compensation Plan under which the holders have the right to receive an aggregate of 70,040 The Company accounts for RSUs granted to consultants using the accounting guidance included in ASC 505-50 “Equity-Based Payments to Non-Employees” (“ASC 505-50”). In accordance with ASC 505-50, the Company estimates the fair value of the unvested portion of the RSU award each reporting period using the closing price of the Company’s common stock. 10,232,019 2.7 Total Weighted Outstanding at January 1, 2016 1,560,996 $ 8.83 RSUs granted 303,206 $ 9.76 RSUs forfeited (92,637) $ 9.90 RSUs vested (328,036) $ 9.41 Outstanding at September 30, 2016 1,443,529 $ 8.82 Performance Share Units (“PSUs”) PSUs shall be earned based on the Company’s achievement of market capitalization growth between the effective date of the Employment Agreement and the end of the Initial Employment Period. If the Company’s market capitalization is $ 100 1.1 100 100 1.1 On March 4, 2016, the compensation committee of the board of directors granted an executive inducement PSUs under which the executive is eligible to receive 63,908 Performance Share Units Performance Share Units Market capitalization $ 102,600,000 $ 106,270,000 Dividend yield 0 % 0 % Expected volatility 75 % 60 % Risk-free interest rate 1.04 % 0.95 % The fair value of the grant of PSUs to purchase a total of 1,342,061 1,278,153 63,908 3,217,528 230,276 277,031 673,405 320,409 At September 30, 2016, the unamortized value of the PSUs was approximately $ 2,054,884 2.3 Total Weighted Outstanding at January 1, 2016 1,135,614 $ 2.62 PSUs granted 63,908 $ 3.15 PSUs forfeited - $ - PSUs vested (128,554) $ 2.65 Outstanding at September 30, 2016 1,070,968 $ 2.65 Deferred Stock Units (“DSUs”) On January 4, 2016, the compensation committee of the board of directors granted to John Gaulding, director and chairman of the board, DSUs under the 2014 Non-Employee Equity Compensation Plan for which Mr. Gaulding has the right to receive 14,953 125,000 75,000 50,000 31,337 0 92,307 0 At September 30, 2016, the unamortized value of the DSUs was $ 32,700 0.3 Total Weighted Outstanding at January 1, 2016 - $ - DSUs granted 14,953 $ 8.36 DSUs forfeited - $ - DSUs vested - $ - Outstanding at September 30, 2016 14,953 $ 8.36 Employee Stock Purchase Plan (“ESPP”) The recently completed offering period for the ESPP was January 1, 2016 through June 30, 2016. The current offering period began July 1, 2016 and runs through December 31, 2016. The weighted-average grant-date fair value of the purchase option for each designated share purchased under this plan was approximately $ 2.57 5.20 97,830 220,546 29,967 The Company estimated the fair value of options granted during the three and nine months ended September 30, 2016 using the Black-Scholes option pricing model. Three Months Ended September Nine Months Ended September 30, Stock price $ 12.16 $8.36 - $12.16 Dividend yield 0 % 0 % Expected volatility 100 % 56% - 100 % Risk-free interest rate 0.37 % 0.37% - 0.49 % Expected life 6 months 6 months Three Months Ended Nine Months Ended 2016 2015 2016 2015 Stock options $ 296,272 $ 232,286 $ 842,569 $ 724,708 RSUs 1,204,982 968,385 3,577,081 3,145,520 IR warrants - - - 85,831 PSUs 230,276 277,031 673,405 320,409 ESPP 97,830 29,967 220,546 29,967 DSUs 31,337 - 92,307 - Total $ 1,860,697 $ 1,507,669 $ 5,405,908 $ 4,306,435 Three Months Ended Nine Months Ended 2016 2015 2016 2015 Research and development $ 960,362 $ 582,320 $ 2,628,454 $ 2,116,631 Sales and marketing 89,072 185,507 213,842 516,377 General and administrative 811,263 739,842 2,563,612 1,673,427 Total $ 1,860,697 $ 1,507,669 $ 5,405,908 $ 4,306,435 |