The following table presents the carrying value and estimated fair value of the Company’s financial instruments not carried at fair value on the consolidated balance sheets at September 30, 2021 and December 31, 2020 (in thousands): | | | | | | | | | | | | | | | September 30, 2021 | | December 31, 2020 | | | Carrying Value | | Estimated Fair Value | | Carrying Value | | Estimated Fair Value | Cash and Cash Equivalents - Level 1 | | $ | 6,706 | | $ | 6,706 | | $ | 1,894 | | $ | 1,894 | Restricted Cash - Level 1 | | $ | 600 | | $ | 600 | | $ | — | | $ | — | Long-Term Debt - Level 2 | | $ | 190,195 | | $ | 195,283 | | $ | 106,809 | | $ | 106,809 |
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