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Convertible Subordinated Notes (Tables)
 12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Our Credit Facility and acquisition debt consisted of the following (in thousands): 
December 31, 2021December 31, 2022
Credit Facility$155,400 $190,700 
Debt issuance costs, net of accumulated amortization of $1,324 and $1,926, respectively
(1,543)(1,864)
Total Credit Facility$153,857 $188,836 
Acquisition debt$4,500 $3,993 
Less: current portion(521)(555)
Total acquisition debt, net of current portion$3,979 $3,438 
The interest expense and amortization of debt issuance costs related to our Credit Facility are as follows (in thousands):
Years ended December 31,
202020212022
Credit Facility interest expense$3,738 $1,820 $7,105 
Credit Facility amortization of debt issuance costs482 380 412 
The imputed interest expense related to our acquisition debt is as follows (in thousands):
Years ended December 31,
202020212022
Acquisition debt imputed interest expense$489 $364 $311 
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,
202020212022
Convertible Notes interest expense$149 $18 $— 
Convertible Notes accretion of debt discount216 20 — 
Convertible Notes amortization of debt issuance costs20 1 — 
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,
202020212022
Senior Notes interest expense$26,500 $21,767 $16,980 
Senior Notes amortization of debt discount528 504 493 
Senior Notes amortization of debt premium221 85 — 
Senior Notes amortization of debt issuance costs280 195 140