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Acquisitions - Narrative (Detail) | Aug. 20, 2019 USD ($) $ / shares shares | Jul. 29, 2019 | Jul. 26, 2019 USD ($) $ / shares shares | Sep. 30, 2019 shares | Dec. 31, 2018 shares
--- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |
Reverse stock split, conversion ratio |  | 0.125 |  |  |
Common stock outstanding (in shares) |  |  |  | 16,800,612 | 13,178,750
American Electric |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares to be issued prior to conversion (in shares) |  |  | 276,549 |  |
Fair value of stock (usd per share) | $ / shares |  |  | $ 7.12 |  |
Number of shares of the combined company (in shares) |  |  | 1,466,092 |  |
Cash | $ |  |  | $ 650,000 |  |
American Electric | Series A Preferred Stock |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares of outstanding series A Convertible Preferred Stock converted (in shares) |  |  | 1,000,000 |  |
American Electric | Restricted Stock Units and Deferred Shares |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Shares of outstanding series A Convertible Preferred Stock converted (in shares) |  |  | 15,629 |  |
American Electric | American Electric |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Common stock outstanding (in shares) |  |  | 1,173,914 |  |
Diversenergy, LLC |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Fair value of stock (usd per share) | $ / shares | $ 4.38 |  |  |  |
Cash | $ | $ 2,000,000 |  |  |  |
Diversenergy, LLC | Common Stock |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of shares of the combined company (in shares) | 684,963 |  |  |  |
Energia Superior |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Ownership interest | 50.00% |  |  |  |
Board of Directors Chairman | Share Exchange Agreement |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of beneficial ownership |  |  | 88.40% |  |

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