Accrued Expenses and Other Current Liabilities (Schedule of Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Payables and Accruals [Abstract]
Compensation	$ 5,264		$ 3,798
Warranty	4,172		3,692
Termination fee	2,775		2,775
Professional fees	907		938
Royalty	1,358		1,445
Customer deposits	602		2,408
Deferred revenue	5,338		6,670
Self insurance	1,459		1,155
Capital lease obligations	2,476		4,411
Income and other taxes	1,205		1,573
Loss on sale contracts	471		765
Severance and restructuring accruals	1,162		1,521
Loss on inventory purchase commitments	738		723
Other	1,915		761
Accrued expenses and other current liabilities	$ 29,842	$ 32,635	$ 32,635