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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 16,643 $ 2,639
Accounts receivable, net 55,968 58,925
Unbilled receivables 48 4,765
Inventories 20,287 21,415
Prepaid expenses and other current assets 4,107 4,433
Total current assets 97,053 92,177
Property, plant and equipment, net 225,165 230,461
Operating lease right-of-use assets 24,892 28,178
Intangible assets, net 8,649 9,046
Other assets 3,475 3,541
Total assets 359,234 363,403
Current liabilities:    
Accounts payable 3,234 3,961
Accrued and other expenses 4,337 8,578
Deferred revenue, current 6,717 7,654
Long-term debt, net, current 6,430 6,175
Operating lease liabilities, current 8,202 13,108
Total current liabilities 33,107 40,018
Deferred revenue, net 277 1,670
Long-term debt, net 24,865 28,240
Operating lease liabilities, long-term 17,248 15,469
Deferred tax liabilities, long-term, net 25,546 24,408
Asset retirement obligation 6,293 6,142
Contingent consideration 570 1,900
Total liabilities 107,906 117,847
Commitments and contingencies (Note 15)
Stockholders’ equity    
Common stock, $0.001 par value, 350,000,000 shares authorized; 41,314,469 issued and 39,754,071 outstanding at June 30, 2020; 40,975,408 issued and 40,234,451 outstanding at December 31, 2019 40 40
Treasury stock, at cost, 1,560,398 and 740,957 shares at June 30, 2020 and December 31, 2019, respectively (4,024) (2,979)
Additional paid-in capital 167,263 165,223
Retained earnings 87,869 83,313
Accumulated other comprehensive income (loss) 180 (41)
Total stockholders’ equity 251,328 245,556
Total liabilities and stockholders’ equity 359,234 363,403
Accrued Income Taxes, Current $ 4,187 $ 542