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Debt - Credit Facilities (Details) - USD ($)
12 Months Ended
Dec. 11, 2018
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]      
Borrowings   $ 2,219,000 $ 0
Revolving Credit Facility      
Debt Instrument [Line Items]      
Credit facility, term 3 years    
Credit facility, maximum borrowing capacity $ 5,000,000.0    
Credit facility, available percentage of receivables 85.00%    
Credit facility, available threshold, percent 50.00%    
Credit facility, available threshold $ 500,000    
Credit facility, minimum borrowing capacity $ 1,000,000.0    
Credit facility, interest rate 0.50% 7.75%  
Credit facility, overdraft fee percentage 2.00%    
Stated interest rate 1.00%    
Right to terminate, notice required, period of time 90 days    
Right to terminate, liquidated damages, year one, percent 3.00%    
Right to terminate, liquidated damages, year two, percent 2.00%    
Right to terminate, liquidated damages, year three, percent 1.00%    
Borrowings   $ 2,200,000  
Prime Rate | Revolving Credit Facility      
Debt Instrument [Line Items]      
Credit facility, basis spread on variable rate 2.00%