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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 2,098 $ 25,588
Accounts receivable 32,224 17,481
Unbilled receivables 4,751 1,884
Inventory 16,875 15,024
Prepaid expenses and other current assets 9,197 13,886
Total current assets 65,145 73,863
Property, plant and equipment, net 270,593 262,465
Operating lease right-of-use assets 30,818 29,828
Intangible assets, net 7,065 7,461
Other assets 347 402
Total assets 373,968 374,019
Current liabilities:    
Accounts payable 12,698 8,479
Accrued expenses and other liabilities 14,146 14,073
Current portion of deferred revenue 9,339 9,842
Current portion of long-term debt 6,869 7,127
Current portion of operating lease liabilities 10,663 9,029
Total current liabilities 53,715 48,550
Long-term deferred revenue 2,389 6,428
Long-term debt 14,783 15,353
Long-term operating lease liabilities 22,541 23,690
Deferred tax liabilities, long-term, net 19,170 22,434
Asset retirement obligation 24,816 16,155
Other Liabilities, Noncurrent 42 249
Total liabilities 137,456 132,859
Commitments and contingencies (Note 14)
Stockholders’ equity    
Treasury stock, at cost, 1,872,880 and 1,777,001 shares at June 30, 2022 and December 31, 2021, respectively 42 42
Treasury stock, at cost, 1,872,880 and 1,777,001 shares at June 30, 2022 and December 31, 2021, respectively (4,776) (4,535)
Additional paid-in capital 176,150 174,486
Retained earnings 64,580 70,593
Accumulated other comprehensive income 516 574
Total stockholders’ equity 236,512 241,160
Total liabilities and stockholders’ equity $ 373,968 $ 374,019
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 350,000,000 350,000,000
Common stock, shares issued (in shares) 44,115,732 43,789,814
Common stock, shares outstanding (in shares) 42,242,852 42,012,813
Treasury stock, shares (in shares) 1,872,880 1,777,001