CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 35,179	$ 14,624
Short-term investments	9,000	40,250
Accounts receivable, net	18,943	16,031
Current maturities of notes receivable	523
Prepaid expenses and other current assets	7,568	4,822
Total current assets	71,213	75,727
Property and equipment, net	96,473	110,917
Notes receivable, net of current maturities	1,109
Intangibles	505	487
Long-term deferred tax assets, net		535
Total assets	169,300	187,666
Current liabilities:
Accounts payable	5,552	5,617
Accrued liabilities:
Payroll costs and other taxes	1,343	885
Other	3,943	2,983
Deferred revenue	8,316	3,155
Current maturities of notes payable and obligations under capital leases	804	2,357
Total current liabilities	19,958	14,997
Long-term liabilities:
Deferred tax liabilities, net	1,491	146
Other accrued liabilities	174	1,639
Total long-term liabilities	1,665	1,785
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, 21,750,107 and 21,704,851 shares issued, and 21,701,662 and 21,656,406 shares outstanding at June 30, 2017 and December 31, 2016, respectively	217	217
Additional paid-in capital	143,419	142,998
Retained earnings	5,282	29,265
Treasury stock, at cost; 48,445 shares at June 30, 2017 and December 31, 2016
Accumulated other comprehensive loss, net	(1,241)	(1,596)
Total stockholders' equity	147,677	170,884
Total liabilities and stockholders' equity	$ 169,300	$ 187,666

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.