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Selling, General and Administrative Expense
 9 Months Ended
Sep. 30, 2020
Other Income and Expenses [Abstract]  
Selling, General and Administrative Expense Selling, General and Administrative Expense
    Selling, general and administrative ("SG&A") expense includes of the following (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
Cash expenses:
Compensation and benefits$3,449 $4,777 $11,138 $16,161 
Professional services5,651 6,104 15,335 12,827 
Other(a)
2,163 1,665 6,572 8,290 
Total cash SG&A expense11,263 12,546 33,045 37,278 
Non-cash expenses:
Bad debt provision626 964 2,306 1,230 
Stock based compensation291 913 1,326 2,705 
Total non-cash SG&A expense917 1,877 3,632 3,935 
Total SG&A expense$12,180 $14,423 $36,677 $41,213 
a.    Includes travel-related costs, information technology expenses, rent, utilities and other general and administrative-related costs.