CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 29,478	$ 26,271
Restricted cash	5,000	5,000
Short-term investments	2,350	2,350
Accounts receivable, net	26,600	24,356
Current maturities of notes receivable	1,434	66
Prepaid expenses and other current assets	4,700	7,575
Total current assets	69,562	65,618
Property and equipment, net	46,396	53,549
Right-of-use assets	5,968	6,605
Notes receivable, net of current maturities		1,394
Intangibles, net	367	385
Long-term deferred tax assets, net		57
Total assets	122,293	127,608
Current liabilities:
Accounts payable	3,260	3,952
Accrued liabilities:
Payroll costs and other taxes	1,978	1,963
Other	2,233	3,599
Deferred revenue	1,159	3,481
Current maturities of notes payable and finance leases	1,562	4,062
Current maturities of operating lease liabilities	1,106	1,200
Total current liabilities	11,298	18,257
Long-term liabilities:
Notes payable and finance leases, net of current maturities	67	96
Operating lease liabilities, net of current maturities	5,386	5,940
Deferred tax liabilities, net	22
Other accrued liabilities		150
Total long-term liabilities	5,475	6,186
Operating 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, 23,399,035 and 23,335,855 shares issued, and 23,350,590 and 23,287,410 shares outstanding at June 30, 2020 and December 31, 2019, respectively	234	233
Additional paid-in capital	154,691	154,235
Retained deficit	(47,238)	(49,731)
Treasury stock, at cost; 48,445 shares
Accumulated other comprehensive loss, net	(2,167)	(1,572)
Total stockholders' equity	105,520	103,165
Total liabilities and stockholders' equity	$ 122,293	$ 127,608