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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 5,510 $ 25,588
Accounts receivable 35,746 17,481
Unbilled receivables 79 1,884
Inventory 20,185 15,024
Prepaid expenses and other current assets 6,593 13,886
Total current assets 68,113 73,863
Property, plant and equipment, net 258,843 262,465
Operating lease right-of-use assets 26,075 29,828
Intangible assets, net 6,669 7,461
Other assets 303 402
Total assets 360,003 374,019
Current liabilities:    
Accounts payable 14,435 8,479
Total accrued liabilities 13,430 14,073
Current portion of deferred revenue 6,959 9,842
Current portion of long-term debt 6,183 7,127
Current portion of operating lease liabilities 10,910 9,029
Total current liabilities 51,917 48,550
Long-term deferred revenue 0 6,428
Long-term debt 9,807 15,353
Long-term operating lease liabilities 17,642 23,690
Deferred tax liabilities, long-term, net 18,238 22,434
Asset retirement obligation 18,888 16,155
Other non-current liabilities 40 249
Total liabilities 116,532 132,859
Commitments and contingencies (Note 18)
Stockholders’ equity    
Common stock, $0.001 par value, 350,000,000 shares authorized; 45,099,067    issued and 43,088,106 outstanding at December 31, 2022; 43,789,814    issued and 42,012,813 outstanding at December 31, 2021 43 42
Treasury stock, at cost, 2,010,961 and 1,777,001 shares at    December 31, 2022 and 2021, respectively (5,075) (4,535)
Additional paid-in capital 178,386 174,486
Retained earnings 69,890 70,593
Accumulated other comprehensive income 227 574
Total stockholders’ equity 243,471 241,160
Total liabilities and stockholders’ equity $ 360,003 $ 374,019