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Marketable Securities (Tables)
 3 Months Ended
Dec. 31, 2013
Marketable Securities [Abstract]  
Schedule of Marketable Securities
At December 31, 2013 our marketable securities were (in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair Value (1)
Current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
$
37,060

 
$
12

 
$
(25
)
 
$
37,047

Certificates of deposit
2,754

 
—

 
(2
)
 
2,752

Government municipal bonds
7,543

 
—

 
(1
)
 
7,542

Current marketable securities
47,357

 
12

 
(28
)
 
47,341

Non-current marketable securities:
 
 
 
 
 
 
 
Certificates of deposit
10,004

 
—

 
(21
)
 
9,983

Total marketable securities
$
57,361

 
$
12

 
$
(49
)
 
$
57,324

(1)
Included in amortized cost and fair value is purchased and accrued interest of $446.

At September 30, 2013 our marketable securities were (in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair Value (1)
Current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
$
35,161

 
$
10

 
$
(30
)
 
$
35,141

Certificates of deposit
1,753

 
—

 
(2
)
 
1,751

Government municipal bonds
10,115

 
—

 
(1
)
 
10,114

Current marketable securities
47,029

 
10

 
(33
)
 
47,006

Non-current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
6,439

 
—

 
(6
)
 
6,433

Certificates of deposit
11,003

 
—

 
(47
)
 
10,956

Non-current marketable securities
17,442

 
—

 
(53
)
 
17,389

Total marketable securities
$
64,471

 
$
10

 
$
(86
)
 
$
64,395

(1)
Included in amortized cost and fair value is purchased and accrued interest of $629.
Schedule of Unrealized Losses on Available-For-Sale Securities
The following tables show the fair values and gross unrealized losses of our available-for-sale marketable securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):
 
December 31, 2013
 
Less than 12 Months
 
More than 12 Months
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
Corporate bonds
$
27,230

 
$
(23
)
 
$
1,815

 
$
(1
)
Certificates of deposit
12,226

 
(24
)
 
—

 
—

Government municipal bonds
5,407

 
(1
)
 
—

 
—

Total
$
44,863

 
$
(48
)
 
$
1,815

 
$
(1
)

 
September 30, 2013
 
Less than 12 Months
 
More than 12 Months
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
Corporate bonds
$
29,911

 
$
(35
)
 
$
2,001

 
$
(1
)
Certificates of deposit
12,451

 
(49
)
 
—

 
—

Government municipal bonds
6,182

 
(1
)
 
—

 
—

Total
$
48,544

 
$
(85
)
 
$
2,001

 
$
(1
)