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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Current assets:    
Cash and cash equivalents $ 16,228 $ 1,385
Accounts receivable, net 3,524 9,970
Contract assets 7,454 391
Prepaid expenses and other current assets 4,222 2,795
Total current assets 31,428 14,541
Property and equipment 237,255 238,064
Less accumulated depreciation (225,925) (225,085)
Property and equipment, net 11,330 12,979
Operating lease right-of-use assets 2,559 3,002
Intangibles, net 367 348
Total assets 45,684 30,870
Current liabilities:    
Accounts payable 2,991 3,381
Accrued liabilities:    
Payroll costs and other taxes 1,786 2,014
Other 932 830
Deferred revenue 17,935 1,570
Current maturities of notes payable and finance leases 1,723 1,010
Current maturities of operating lease liabilities 1,178 1,125
Total current liabilities 26,545 9,930
Long-term liabilities:    
Notes payable and finance leases, net of current maturities 1,127 1,512
Operating lease liabilities, net of current maturities 1,583 2,131
Deferred tax liabilities, net 16 16
Total long-term liabilities 2,726 3,659
Commitments and contingencies
Stockholders' equity:    
Preferred stock-par value $1.00 per share; 4,000,000 shares authorized, none outstanding
Common stock-par value $0.01 per share; 35,000,000 shares authorized, 31,047,801 and 30,983,437 shares issued and outstanding at June 30, 2025 and December 31, 2024, respectively 310 310
Additional paid-in capital 157,115 157,073
Accumulated deficit (138,976) (137,619)
Accumulated other comprehensive loss, net (2,036) (2,483)
Total stockholders' equity 16,413 17,281
Total liabilities and stockholders' equity $ 45,684 $ 30,870