CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 26,271,000	$ 28,729,000
Restricted cash	5,000,000
Short-term investments	2,350,000	10,583,000
Accounts receivable, net of allowance for doubtful accounts of $250 at December 31, 2019 and 2018	24,356,000	25,338,000
Current maturities of notes receivable	66,000	64,000
Prepaid expenses and other current assets	7,575,000	12,311,000
Total current assets	65,618,000	77,025,000
Property and equipment	284,647,000	293,948,000
Less accumulated depreciation	(231,098,000)	(222,407,000)
Property and equipment, net	53,549,000	71,541,000
Right-of-use assets	6,605,000
Notes receivable, net of current maturities	1,394,000	1,447,000
Intangibles, net	385,000	379,000
Long-term deferred tax assets, net	57,000	293,000
Total assets	127,608,000	150,685,000
Current liabilities:
Accounts payable	3,952,000	5,427,000
Accrued liabilities:
Payroll costs and other taxes	1,963,000	1,034,000
Other	3,599,000	3,643,000
Deferred revenue	3,481,000	10,501,000
Current maturities of notes payable and finance leases	4,062,000	6,683,000
Current maturities of operating lease liabilities	1,200,000
Total current liabilities	18,257,000	27,288,000
Long-term liabilities:
Notes payable and finance leases, net of current maturities	96,000	6,097,000
Operating lease liabilities, net of current maturities	5,940,000
Deferred tax liabilities, net		134,000
Other accrued liabilities	150,000	150,000
Total long-term liabilities	6,186,000	6,381,000
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, 23,335,855 and 23,018,441 shares issued, and 23,287,410 and 22,969,996 shares outstanding at December 31, 2019 and 2018, respectively	233,000	230,000
Additional paid-in capital	154,235,000	153,268,000
Retained deficit	(49,731,000)	(34,518,000)
Treasury stock, at cost; 48,445 shares
Accumulated other comprehensive loss, net	(1,572,000)	(1,964,000)
Total stockholders’ equity	103,165,000	117,016,000
Total liabilities and stockholders’ equity	$ 127,608,000	$ 150,685,000

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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682