FINANCIAL INFORMATION Revised Consolidated Balance Sheets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 48,203	$ 50,233	$ 70,390
Accounts receivable		55,560	67,956
Inventories		61,670	69,143
Deferred tax assets, net		562	586
Prepaid expenses		8,074	9,060
Other current assets		21,354	19,950
Total current assets		197,453	237,085
Property and equipment, net		36,940	41,441
Intangible assets, net		5,674	9,217
Other assets		2,488	3,793
Total assets		245,412	294,361
Current liabilities:
Accounts payable		30,583	35,425
Accrued compensation and benefits		23,604	25,177
Accrued expenses and other current liabilities		36,916	34,003
Income taxes payable		7,328	7,969
Deferred revenues		219,178	230,305
Total current liabilities		317,805	333,082
Long-term liabilities		14,985	17,978
Total liabilities		606,641	679,953
Stockholders' equity:
Common stock		423	423
Additional paid-in capital		1,042,249	1,039,562
Accumulated deficit		(1,337,655)	(1,357,679)
Treasury stock at cost, net of reissuances		(72,599)	(75,542)
Accumulated other comprehensive income		6,353	7,644
Total stockholders' equity		(361,229)	(385,592)
Total liabilities and stockholders' equity		$ 245,412	$ 294,361