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Convertible Subordinated Notes (Tables)
 12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Our Credit Facility and acquisition debt consisted of the following (in thousands): 
December 31, 2022December 31, 2023
Credit Facility$190,700 $179,100 
Debt issuance costs, net of accumulated amortization of $1,926 and $2,478, respectively
(1,864)(1,306)
Total Credit Facility$188,836 $177,794 
Acquisition debt$3,993 $5,998 
Less: current portion(555)(537)
Total acquisition debt, net of current portion$3,438 $5,461 
The interest expense and amortization of debt issuance costs related to our Credit Facility are as follows (in thousands):
Years ended December 31,
202120222023
Credit Facility interest expense$1,820 $7,105 $17,251 
Credit Facility amortization of debt issuance costs380 412 552 
The imputed interest expense related to our acquisition debt is as follows (in thousands):
Years ended December 31,
202120222023
Acquisition debt imputed interest expense$364 $311 $291 
The interest expense and accretion of debt discount and debt issuance costs related to our Convertible Notes are as follows (in thousands):
Years ended December 31,
202120222023
Convertible Notes interest expense$18 $— $— 
Convertible Notes accretion of debt discount20 — — 
Convertible Notes amortization of debt issuance costs1 — — 
The interest expense and amortization of debt discount, debt premium and debt issuance costs related to our Senior Notes are as follows (in thousands):
Years ended December 31,
202120222023
Senior Notes interest expense$21,767 $16,980 $17,000 
Senior Notes amortization of debt discount504 493 515 
Senior Notes amortization of debt premium85 — — 
Senior Notes amortization of debt issuance costs195 140 147