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Related Party Transactions - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) Members shares | Mar. 31, 2017 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items] |  |  |  |
Accounts receivable-affiliate | $ 307,351 |  |  | $ 394,026
ESOP [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Loan receivable outstanding | $ 4,700,000 |  |  | 4,700,000
Chesapeake Hospitality [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Number of former members | Members | 2 |  |  |
Company's outstanding common stock owned by members of Chesapeake Hospitality | 10.50% |  |  |
Operating Partnership units owned by members of Chesapeake Hospitality | shares | 652,326 |  |  |
Company's common stock shares owned by members of Chesapeake Hospitality | shares | 1,481,833 |  |  |
Accounts receivable-affiliate | $ 101,405 |  |  | 113,669
Agreement term | 5 years |  |  |
Incentive management fee equal to increase in gross operating profit percentage | 10.00% |  |  |
Maximum incentive management fee of gross revenues | 0.25% |  |  |
Base management and administrative fees earned by related party | $ 1,097,722 | $ 973,068 |  |
Incentive management fees earned by related party | 22,397 | 26,293 |  |
Employee medical benefits paid | 1,503,825 | 1,267,936 |  |
Workers' compensation insurance premium paid | 100,000 | 0 |  |
Chesapeake Hospitality [Member] | Crowne Plaza Hampton Marina [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Termination fee | $ 0 |  |  |
Chesapeake Hospitality [Member] | Fiscal Year 2017 [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of management fee due | 2.65% |  |  |
Chesapeake Hospitality [Member] | Fiscal Year 2017 and Thereafter [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of management fee due | 2.50% |  |  |
Chesapeake Hospitality [Member] | Individual Hotel Management Agreements [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Management fee of gross revenues for first full fiscal year | 2.00% |  |  |
Management fee of gross revenues for second full fiscal year | 2.25% |  |  |
Management fee of gross revenues for every year thereafter | 2.50% |  |  |
Chesapeake Hospitality [Member] | Whitehall and Georgian Terrace Hotel [Member] | Fiscal Year 2015 [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of management fee due | 2.00% |  |  |
Chesapeake Hospitality [Member] | Whitehall and Georgian Terrace Hotel [Member] | Fiscal Year 2016 [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of management fee due | 2.25% |  |  |
Chesapeake Hospitality [Member] | Whitehall and Georgian Terrace Hotel [Member] | Fiscal Year Thereafter [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of management fee due | 2.50% |  |  |
Sotherly Foundation [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amount loaned to related party |  |  | $ 180,000 |
Loan receivable outstanding | $ 40,000 |  |  | $ 40,000
Immediate Family Members of Chief Executive Officer [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Total compensation for related parties | 97,260 | 91,277 |  |
Partnership controlled by Chief Executive Officer [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Business-related air travel expense reimbursed to partnership | $ 24,052 | $ 48,859 |  |

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