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Subsequent Events (Details) - Subsequent Event - USD ($)
1 Months Ended
May 14, 2019
Apr. 30, 2019
Apr. 26, 2019
Subsequent Event [Line Items]      
Contract sales price $ 88,800,000    
Deposit on acquisition $ 4,400,000    
Refundable deposit made   $ 1,000,000  
Debt covenant, minimum net worth requirement     $ 175,000,000
Debt covenant, minimum liquid assets requirement     10,000,000
Term Loan 3.6725% Due 2024 [Member] | Secured Debt [Member]      
Subsequent Event [Line Items]      
Loan amount     $ 55,000,000.0
Fixed interest rate, percent     3.6725%