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CONSOLIDATED BALANCE SHEETS - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 1,385,000 $ 10,772,000
Restricted cash   5,000,000
Short-term investments 0 265,000
Accounts receivable, net of allowance for credit losses of $250 at December 31, 2024 and 2023 9,970,000 12,735,000
Prepaid expenses and other current assets 3,186,000 8,654,000
Total current assets 14,541,000 37,426,000
Property and equipment 238,064,000 241,955,000
Less accumulated depreciation (225,085,000) (225,447,000)
Property and equipment, net 12,979,000 16,508,000
Operating lease right-of-use assets 3,002,000 3,208,000
Intangibles, net 348,000 377,000
Total assets 30,870,000 57,519,000
Current liabilities:    
Accounts payable 3,381,000 3,883,000
Accrued liabilities:    
Payroll costs and other taxes 2,014,000 3,415,000
Other 830,000 709,000
Deferred revenue 1,570,000 11,829,000
Current maturities of notes payable and finance leases 1,010,000 1,380,000
Current maturities of operating lease liabilities 1,125,000 1,202,000
Total current liabilities 9,930,000 22,418,000
Long-term liabilities:    
Notes payable and finance leases, net of current maturities 1,512,000 1,289,000
Operating lease liabilities, net of current maturities 2,131,000 2,363,000
Deferred tax liabilities, net 16,000 15,000
Total long-term liabilities 3,659,000 3,667,000
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, 30,983,437 and 30,812,329 shares issued and outstanding at December 31, 2024 and 2023, respectively 310,000 308,000
Additional paid-in capital 157,073,000 156,678,000
Accumulated deficit (137,619,000) (123,640,000)
Accumulated other comprehensive loss, net (2,483,000) (1,912,000)
Total stockholders' equity 17,281,000 31,434,000
Total liabilities and stockholders' equity $ 30,870,000 $ 57,519,000