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Mergers and Acquisitions - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Dec. 08, 2017 | Mar. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  | $ 9.88 | $ 9.75
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | [1] |  |  | 6,109,205 |
Payments for Agreement Termination |  |  |  | $ 400,000 |
Increase Decrease Deferred Tax Asset |  |  |  | 900,000 |
Preferred Stock [Member] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value | [2] |  |  | $ 19,118,000 |
APA ACO, Inc [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |
Network Medical Management, Inc. [Member] |  |  |  |  |
Payments for Agreement Termination |  |  |  | $ 400,000 |
Network Medical Management, Inc. [Member] | Noncontrolling Interest [Member] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value | [3] |  |  | $ 5,129,000 |
Network Medical Management, Inc. [Member] | APA ACO, Inc [Member] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |
Apollo Medical Holdings, Inc [Member] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquire, Number of Share |  | 2,566,666 |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 82.00% |  |  |
Business Combination, Consideration Description |  |  |  | The consideration for the transaction was 18% of the total issued and outstanding shares of ApolloMed common stock, or 6,109,205 (immediately following the Merger). |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares |  | 6,109,205 |  |  |
Fair Value Assumptions, Expected Term |  |  |  | 2 years |
Fair Value Assumptions, Expected Volatility Rate |  |  |  | 37.90% |
Fair Value Assumptions, Risk Free Interest Rate |  |  |  | 1.80% |
Preferred Stock, Liquidation Preference, Value |  |  |  | $ 12,745,000 |
Apollo Medical Holdings, Inc [Member] | Convertible Promissory Note [Member] |  |  |  |  |
Debt Conversion, Converted Instrument, Shares Issued |  |  | 520,081 |  |
Debt Conversion, Converted Instrument, Amount |  |  | $ 4,990,000 |  |
Apollo Medical Holdings, Inc [Member] | Warrant One [Member] |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 850,000 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  | $ 11.00 |  |  |
Apollo Medical Holdings, Inc [Member] | Warrant Two [Member] |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 900,000 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  | $ 10.00 |  |  |
Maverick Medical Group, Inc [Member] |  |  |  |  |
Business Combination, Contingent Consideration, Asset |  |  |  | 100 |
Common Class B [Member] | Apollo Medical Holdings, Inc [Member] |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value |  |  |  | $ 6,373,000 |
[1] | Represents the number of shares of the combined company that pre-Merger ApolloMed stockholders would own at closing of the Merger.
[2] | Estimated fair value of ApolloMed’s preferred shares held by NMM NMM currently owns all the shares of ApolloMed Series A preferred stock and Series B preferred stock, which was acquired prior to the Merger. As part of the Merger, the ApolloMed Series A preferred stock and Series B preferred stock is remeasured at fair value and included as part of the consideration transferred to ApolloMed. The fair value of the Series A preferred stock and Series B preferred stock is reflective of the liquidation preferences, claims of priority and conversion option values thereof. In aggregate, the Series A preferred stock and Series B preferred stock were valued to be $19,118,000. The valuation methodology was based on an Option Pricing Method (“OPM”) which utilized the observable publicly traded common stock price in valuing the Series A preferred stock and the Series B preferred stock within the context of the capital structure of the Company. OPM assumptions included an expected term of 2 years, volatility rate of 37.9%, and a risk-free rate of 1.8%. The fair value of the liquidation preference for the Series A preferred stock and the Series B preferred stock was determined to be $12,745,000 and the fair value of the conversion option was determined to be $6,373,000 or an aggregate total fair value of $19,118,000.
[3] | Estimated fair value of NMM’s 50% share of APA ACO Inc. Prior to the Merger, APAACO was owned 50% by ApolloMed and 50% NMM. NMM’s noncontrolling interest in APAACO has been remeasured at fair value as of the closing date and is added to the consideration transferred to ApolloMed as a result of NMM relinquishing its equity investment in APAACO in order to obtain control of ApolloMed. The fair value of NMM’s noncontrolling interest in APAACO has been estimated to be $5,129,000 using the discounted cash flow method and NMM recorded a gain on investment for the same amount to reflect the fair value of this investment prior the Merger.

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