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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 24,654 $ 25,376
Restricted cash 5,000 5,000
Short-term investments 265 265
Accounts receivable, net 1,781 8,905
Prepaid expenses and other current assets 4,186 3,313
Total current assets 35,886 42,859
Property and equipment 21,301 26,349
Right-of-use assets 4,456 4,435
Intangibles, net 388 395
Total assets 62,031 74,038
Current liabilities:    
Accounts payable 1,068 2,580
Accrued liabilities:    
Payroll costs and other taxes 632 1,066
Other 1,253 1,338
Deferred revenue 1,472 1,344
Current maturities of notes payable and finance leases 522 302
Current maturities of operating lease liabilities 1,057 961
Total current liabilities 6,004 7,591
Long-term liabilities:    
Notes payable and finance leases, net of current maturities   8
Operating lease liabilities, net of current maturities 3,869 3,942
Deferred tax liabilities, net 20 20
Total long-term liabilities 3,889 3,970
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, 23,812,329 and 23,692,379 shares issued, and 23,812,329 and 23,643,934 shares outstanding at June 30, 2022 and December 31, 2021, respectively 238 237
Additional paid-in capital 155,669 155,268
Accumulated deficit (102,087) (92,018)
Treasury stock, at cost; 0 and 48,445 shares at June 30, 2022 and December 31, 2021, respectively
Accumulated other comprehensive loss, net (1,682) (1,010)
Total stockholders' equity 52,138 62,477
Total liabilities and stockholders' equity $ 62,031 $ 74,038