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Debt (Narrative) (Details) - USD ($)
9 Months Ended
Apr. 25, 2018
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Sep. 01, 2017
Debt Instrument [Line Items]          
Payment of convertible debt   $ 1,461,000      
Common Stock, par value   $ 0.01 $ 0.01   $ 0.01
MB Financial Bank, N.A. [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate   6.00%      
Aggregate borrowing capacity $ 25,000,000        
Maturity date   Apr. 10, 2020      
Commitment fee amount $ 250,000        
Undrawn commitment fee percentage   0.50%      
Line of Credit Facility, possible request of reduction in borrowing commitment   $ 1,000,000      
Line of Credit Facility, possible request of reduction in borrowing commitment multiple after initial request   $ 500,000      
Line of Credit Facility, request reduction notice period   5 days      
Current borrowing   $ 0      
Alesco Capital Trust I [Member] | Junior subordinated debt [Member]          
Debt Instrument [Line Items]          
Principal amount of debt outstanding [1]   $ 28,125,000 $ 28,125,000    
Stated interest rate [1],[2]   6.34%      
Sunset Financial Statutory Trust I [Member] | Junior subordinated debt [Member]          
Debt Instrument [Line Items]          
Principal amount of debt outstanding [1]   $ 20,000,000 20,000,000    
Fair value of common securities   $ 0      
Stated interest rate [1],[2]   6.49%      
8.00% Contingent Convertible Senior Notes Due 2022 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Face Amount   $ 15,000,000      
Proceeds from Issuance of Debt   15,000,000      
Debt Issuance Costs, Gross   $ 600,000   $ 600,000  
Debt extension term   1 year      
Stated interest rate   8.00%      
Debt instrument, dividend threshold for reduced payment   $ 0.20      
Contingent portion of interest payable   50.00%      
Portion of interest payable added to principal   50.00%      
Interest rate, in event of default   9.00%      
Conversion price per unit   $ 1.45      
8.00% Contingent Convertible Senior Notes Due 2022 [Member] | Contingent Convertible Senior Notes [Member]          
Debt Instrument [Line Items]          
Principal amount of debt outstanding   $ 15,000,000 15,000,000    
Stated interest rate [2]   8.00%      
Conversion price per unit   $ 1.45      
Debt Instrument, Convertible, Conversion Ratio   10      
Debt instrument, noncontrolling interests, convertible price   $ 14.50      
8.00% Contingent Convertible Senior Notes Due 2018 [Member]          
Debt Instrument [Line Items]          
Conversion price per unit   30.00      
8.00% Contingent Convertible Senior Notes Due 2019 [Member]          
Debt Instrument [Line Items]          
Conversion price per unit   $ 12.00      
Contingency shares outstanding threshold for conversion   19.99%      
8.00% Contingent Convertible Senior Notes Due 2019 [Member] | Contingent Convertible Senior Notes [Member]          
Debt Instrument [Line Items]          
Principal amount of debt outstanding   $ 6,786,000 $ 8,248,000    
Stated interest rate [2]   8.00%      
Conversion price per unit   $ 12.00      
[1] The junior subordinated notes listed represent debt the Company owes to the two trusts noted above. The total par amount owed by the Company to the trusts is $49,614. However, the Company owns the common stock of the trusts in a total par amount of $1,489. The Company pays interest (and at maturity, principal) to the trusts on the entire $49,614 junior notes outstanding. However, the Company receives back from the trusts the pro rata share of interest and principal on the common stock held by the Company. These trusts are VIEs and the Company does not consolidate them even though the Company holds common stock. The Company carries the common stock on its balance sheet at a value of $0.
[2] Represents the interest rate in effect as of the last day of the reporting period.