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Credit Facility and Acquisition Debt (Tables)
 9 Months Ended
Sep. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Long-term Debt
Our Credit Facility and Acquisition debt consisted of the following (in thousands):
December 31, 2021September 30, 2022
Credit Facility$155,400 $169,000 
Debt issuance costs, net of accumulated amortization of $1,324 and $1,617, respectively
(1,543)(1,590)
Total Credit Facility$153,857 $167,410 
Acquisition debt$4,500 $4,460 
Less: current portion(521)(614)
Total acquisition debt, net of current portion$3,979 $3,846 
The imputed interest expense related to our acquisition debt is as follows (in thousands):
Three months ended September 30,Nine months ended September 30,
2021202220212022
Acquisition debt imputed interest expense$90 $78 $280 $237 
The interest expense and amortization of debt discount, debt premium and debt issuance costs related to our Senior Notes are as follows (in thousands):
Three months ended September 30,Nine months ended September 30,
2021202220212022
Senior Notes interest expense$4,250 $4,250 $17,517 $12,730 
Senior Notes amortization of debt discount118 125 384 368 
Senior Notes amortization of debt premium— — 85 — 
Senior Notes amortization of debt issuance costs34 35 161 104 
Schedule of Line of Credit Facilities
The interest expense and amortization of debt issuance costs related to our Credit Facility are as follows (in thousands):
Three months ended September 30,Nine months ended September 30,
2021202220212022
Credit Facility interest expense$383 $1,971 $1,200 $4,132 
Credit Facility amortization of debt issuance costs80 109 297 293