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Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Long-term debt maturities
As of December 31, 2021, long-term debt matures as follows (in thousands):
2022$— 
2023875 
20242,131 
20252,174 
20262,218 
Thereafter3,602 
Total maturities of long-term debt11,000 
Less: Current portion of long-term debt— 
Total long-term debt, net of current portion$11,000 
Debt due to the DECD is collateralized by providing a security interest in certain machinery and equipment the Company acquired from ISMMS, as defined in a separate security agreement. The DECD Security Agreement provides a security for the payment and performance of meeting the Company’s obligations to the DECD until the obligations have been fully satisfied.