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Convertible Debentures (Tables)
 9 Months Ended
Jun. 30, 2013
Debt Disclosure [Abstract]  
Convertible debenture activity
Convertible debenture activity for the three and nine months ended June 30, 2013 and 2012 is as follows:
 
Three Months Ended June 30,
 
Nine Months Ended June 30,
 
2013
 
2012
 
2013
 
2012
 
(in thousands)
 
(in thousands)
Beginning balance:
 
 
 
 
 
 
 
Gross balance
$
6,487

 
$
17,721

 
$
18,328

 
$
2,493

Less: Discounts
(906
)
 
(2,631
)
 
(2,440
)
 
(529
)

5,581

 
15,090

 
15,888

 
1,964

Proceeds:


 


 


 


To convertible debentures, before allocations
—

 
—

 
—

 
14,664

Allocated to detachable warrants
—

 
—

 
—

 
(1,660
)
Allocated to beneficial conversion feature
—

 
—

 
—

 
(140
)
Allocated to conversion option liability
—

 
—

 
—

 
(467
)
Interest expense:


 


 


 


PIK interest
156

 
301

 
707

 
865

Amortization of debt discount
43

 
93

 
190

 
258

Recognition of unamortized debt discount upon conversion
863

 
—

 
2,250

 
—

Conversion:


 


 


 


Issuance of common shares
(6,643
)
 
—

 
(19,035
)
 
—

Ending balance:


 


 


 


Gross balance
—

 
18,022

 
—

 
18,022

Less: Discounts
—

 
(2,538
)
 
—

 
(2,538
)
Ending balance
$
—

 
$
15,484

 
$
—

 
$
15,484