CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2015	Sep. 30, 2014
Current assets:
Cash and cash equivalents	$ 37,009,000	$ 22,753,000
Short-term investments	21,000,000	27,000,000
Accounts receivable, net of allowance for doubtful accounts of $250,000 at December 31, 2015 and September 30, 2014	35,700,000	39,995,000
Prepaid expenses and other assets	6,150,000	2,420,000
Total current assets	99,859,000	92,168,000
Property, plant and equipment	345,619,000	337,922,000
Less accumulated depreciation	(198,052,000)	(173,428,000)
Net property, plant and equipment	147,567,000	164,494,000
Intangibles	361,000
Total assets	247,787,000	256,662,000
Current liabilities:
Accounts payable	8,401,000	10,720,000
Accrued liabilities:
Payroll costs and other taxes	1,074,000	1,998,000
Other	4,604,000	4,097,000
Deferred revenue	6,146,000	801,000
Current maturities of notes payable and obligations under capital leases	8,585,000	6,752,000
Total current liabilities	28,810,000	24,368,000
Long-term liabilities:
Notes payable and obligations under capital leases less current maturities	2,106,000	4,933,000
Deferred tax liability, net	5,319,000	27,831,000
Other accrued liabilities	1,834,000
Total long-term liabilities	$ 9,259,000	$ 32,764,000
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, 21,629,310 and 14,194,810 shares issued, and 21,580,865 and 14,194,810 shares outstanding at December 31, 2015 and September 30, 2014, respectively	$ 216,000	$ 142,000
Additional paid-in capital	142,269,000	98,632,000
Retained earnings	$ 69,057,000	$ 100,973,000
Treasury stock, at cost; 48,445 shares at December 31, 2015 and none at September 30, 2014
Accumulated other comprehensive loss, net of tax	$ (1,824,000)	$ (217,000)
Total stockholders' equity	209,718,000	199,530,000
Total liabilities and stockholders' equity	$ 247,787,000	$ 256,662,000

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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3-4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 3
-Subparagraph a(1)
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 4
-Article 5