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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 30,378,000 $ 37,009,000
Short-term investments 32,250,000 21,000,000
Accounts receivable, net 26,720,000 35,700,000
Prepaid expenses and other assets 5,605,000 6,150,000
Total current assets 94,953,000 99,859,000
Property and equipment, net 139,136,000 147,567,000
Intangibles 361,000 361,000
Total assets 234,450,000 247,787,000
Current liabilities:    
Accounts payable 4,152,000 8,401,000
Accrued liabilities:    
Payroll costs and other taxes 2,704,000 1,074,000
Other 5,181,000 4,604,000
Deferred revenue 5,615,000 6,146,000
Current maturities of notes payable and obligations under capital leases 7,141,000 8,585,000
Total current liabilities 24,793,000 28,810,000
Long-term liabilities:    
Notes payable and obligations under capital leases less current maturities 1,295,000 2,106,000
Deferred tax liability, net 4,429,000 5,319,000
Other accrued liabilities 1,899,000 1,834,000
Total long-term liabilities $ 7,623,000 $ 9,259,000
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, 21,644,685 and 21,629,310 issued, and 21,596,240 and 21,580,865 shares outstanding at March 31, 2016 and December 31, 2015, respectively $ 216,000 $ 216,000
Additional paid-in capital 142,466,000 142,269,000
Retained earnings $ 60,457,000 $ 69,057,000
Treasury stock, at cost; 48,445 shares at March 31, 2016 and December 31, 2015
Accumulated other comprehensive loss, net of tax $ (1,105,000) $ (1,824,000)
Total stockholders' equity 202,034,000 209,718,000
Total liabilities and stockholders' equity $ 234,450,000 $ 247,787,000