Notes Payable - Bridge Loan (Details)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 02, 2018
USD ($)
payment
Jun. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Bridge Loan      
Maturity period if Penalty Loan is funded 1 year    
Subordinated Loans      
Bridge Loan      
Number of principle payments required prior to maturity | payment 0    
Number of principle payments permitted prior to the first anniversary of the loan closing date | payment 0    
Increase in interest rate in event of default 2.50%    
Interest rate above the otherwise applicable rate to be charged upon event of default 2.50%    
Bridge Loan      
Bridge Loan      
Principal amount of loan $ 2.0    
Incremental borrowings against Bridge Loan   $ 2.0 $ 2.0
Borrowings outstanding   $ 2.0 $ 2.0
Penalty loan      
Bridge Loan      
Principal amount of loan $ 1.0    
Prime Rate | Bridge Loan      
Bridge Loan      
Per annum cash rate over variable rate 8.00%    
Paid-in-kind rate above prime rate 2.00%    
Prime Rate | Penalty loan      
Bridge Loan      
Paid-in-kind rate above prime rate 5.00%