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Investments in Other Entities - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 14, 2016 | Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2015 | Dec. 31, 2017 | Nov. 15, 2016 | Aug. 10, 2015 | Jul. 01, 2015 | Dec. 31, 2012 | Oct. 15, 2012
Income (Loss) from Equity Method Investments |  | $ (28,024) | $ 2,227,262 |  |  |  |  |  |  |
Equity Method Investments |  | 21,875,500 |  |  | $ 21,903,524 |  |  |  |  |
Due from Related Parties, Noncurrent |  | 5,000,000 |  |  | 5,000,000 |  |  |  |  |
LaSalle Medical Associates IPA [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  | 9,099,975 |  |  | 9,452,767 |  |  |  |  |
Pacific Medical Imaging and Oncology Center, Inc [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  | 40.00% |  |
Equity Method Investment, Aggregate Cost |  |  |  |  |  |  |  | $ 1,200,000 |  |
Income (Loss) from Equity Method Investments |  | (26,025) | 51,080 |  |  |  |  |  |  |
Equity Method Investments |  | 1,374,668 |  |  | 1,400,693 |  |  |  |  |
Pacific Medical Imaging and Oncology Center, Inc [Member] | Ancillary Service Contract [Member] |  |  |  |  |  |  |  |  |  |
Payments for Other Fees |  | 400,000 | 500,000 |  |  |  |  |  |  |
Universal Care Inc [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  | $ 8,589,253 |  |  | 8,609,455 |  |  |  |  |
Payments for Advance to Affiliate |  |  |  | $ 5,000,000 |  |  |  |  |  |
Loans Receivable, Basis Spread on Variable Rate |  | 1.00% |  |  |  |  |  |  |  |
Due from Related Parties, Noncurrent |  | $ 5,000,000 |  |  | $ 5,000,000 |  |  |  |  |
Loans Receivable, Interest Rate |  | 5.75% |  |  | 5.50% |  |  |  |  |
Diagnostic Medical Group [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  | $ 2,176,453 |  |  | $ 1,847,411 |  |  |  |  |
Payments to Acquire Equity Method Investments | $ 1,600,000 |  |  |  |  |  |  |  |  |
Pacific Ambulatory Surgery Center, LLC [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  | 635,151 |  |  | 593,198 |  |  |  |  |
Allied Pacific of California [Member] | LaSalle Medical Associates IPA [Member] |  |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  | (352,792) | 1,311,738 |  |  |  |  |  |  |
Equity Method Investments |  | 9,099,975 |  |  | 9,452,767 |  |  |  |  |
Allied Pacific of California [Member] | Universal Care Inc [Member] |  |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  | (20,202) | 523,301 |  |  |  |  |  |  |
Equity Method Investments |  | 8,589,253 |  |  | 8,609,455 |  |  |  |  |
Allied Pacific of California [Member] | Diagnostic Medical Group [Member] |  |  |  |  |  |  |  |  |  |
Income (Loss) from Equity Method Investments |  | 329,042 | 361,644 |  |  |  |  |  |  |
Equity Method Investments |  | 2,176,453 |  |  | 1,847,411 |  |  |  |  |
Allied Pacific of California [Member] | Pacific Ambulatory Surgery Center, LLC [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 40.00% |  |  |  |
Equity Method Investment, Aggregate Cost |  |  |  |  |  | $ 800,000 |  |  |  |
Income (Loss) from Equity Method Investments |  | 41,953 | $ (20,501) |  |  |  |  |  |  |
Equity Method Investments |  | $ 635,151 |  |  | $ 593,198 |  |  |  |  |
APC LSMA [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 40.00% |  |  |  |  |  |  |  |  |
APC LSMA [Member] | LaSalle Medical Associates IPA [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 25.00% |
Equity Method Investment, Aggregate Cost |  |  |  |  |  |  |  |  | $ 5,000,000 |
APC LSMA [Member] | Allied Pacific of California [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  | 100.00%
Universal Care Acquisition Partners, LLC [Member] | Universal Care Inc [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Aggregate Cost |  |  |  |  |  |  | $ 10,000,000 |  |  |
Universal Care Acquisition Partners, LLC [Member] | Allied Pacific of California [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  | 100.00% |  |  |
Voting Common Stock A Two [Member] | Universal Care Acquisition Partners, LLC [Member] | Universal Care Inc [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investments, Purchase of Shares |  |  |  |  |  |  | 100,000 |  |  |
Equity Method Investments, Proportion of Ownership Interest in Voting Common Stock |  |  |  |  |  |  | 50.00% |  |  |
Voting Common Stock A Two [Member] | Universal Care Acquisition Partners, LLC [Member] | Universal Care Inc [Member] | Ancillary Service Contract [Member] |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  | 48.90% |  |  |

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