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Long-Term Debt (Details) - USD ($)
3 Months Ended 12 Months Ended
May 23, 2017
Mar. 31, 2018
Dec. 31, 2017
Line of Credit [Member]      
Long-Term Debt (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 4,000,000  
Revolving Credit Facility [Member]      
Long-Term Debt (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 3,000,000  
Debt Instrument, Basis Spread on Variable Rate   6.00% 4.00%
Debt Instrument, Interest Rate, Effective Percentage   10.75% 8.50%
Debt Instrument, Description of Variable Rate Basis   prime plus 6.0% prime plus 4.0%
Term Loan [Member]      
Long-Term Debt (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,000,000  
Debt Instrument, Basis Spread on Variable Rate   6.00%  
Debt Instrument, Interest Rate, Effective Percentage   10.75%  
Debt Instrument, Description of Variable Rate Basis   prime plus 6.0%  
Debt Instrument, Interest Rate, Stated Percentage     10.75%
8¼% Limited Convertible Senior Subordinated Notes Due 2012 [Member]      
Long-Term Debt (Details) [Line Items]      
Notes Payable   $ 387,000  
Debt Instrument, Maturity Date   Mar. 01, 2012  
Interest Payable, Current   $ 274,000 $ 266,000
9½% Subordinated Debentures Due 2012 [Member]      
Long-Term Debt (Details) [Line Items]      
Notes Payable   220,000  
Interest Payable, Current   $ 174,000 $ 169,000
Debentures, Matured Date   Dec. 01, 2012  
Forgivable Loan [Member]      
Long-Term Debt (Details) [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 2.00%    
Debt Instrument, Interest Rate, Effective Percentage   6.75%  
Debt Instrument, Description of Variable Rate Basis prime plus 2.00%    
Proceeds from Loans $ 650,000    
Line of Credit Facility, Expiration Date Apr. 01, 2024 Apr. 01, 2025  
Line of Credit Facility, Expiration Period   1 year