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Marketable Securities (Tables)
 9 Months Ended
Jun. 30, 2016
Marketable Securities [Abstract]  
Schedule of Marketable Securities
At June 30, 2016 our marketable securities were (in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair Value (1)
Current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
$
34,116

 
$
—

 
$
(43
)
 
$
34,073

Commercial paper
23,966

 
—

 
(12
)
 
23,954

Certificates of deposit
2,005

 
1

 
—

 
2,006

Government municipal bonds
3,106

 
—

 
(2
)
 
3,104

Current marketable securities
63,193

 
1

 
(57
)
 
63,137

Non-current marketable securities:
 
 
 
 
 
 
 
Certificates of deposit
7,275

 
46

 
—

 
7,321

Total marketable securities
$
70,468

 
$
47

 
$
(57
)
 
$
70,458

(1)
Included in amortized cost and fair value is purchased and accrued interest of $282.
6. MARKETABLE SECURITIES (CONTINUED)
At September 30, 2015 our marketable securities were (in thousands):
 
Amortized
Cost (1)
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair Value (1)
Current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
$
31,753

 
$
—

 
$
(39
)
 
$
31,714

Commercial paper
7,986

 
—

 
(1
)
 
7,985

Certificates of deposit
6,253

 
8

 
—

 
6,261

Government municipal bonds
1,232

 
—

 
(1
)
 
1,231

Current marketable securities
47,224

 
8

 
(41
)
 
47,191

Non-current marketable securities:
 
 
 
 
 
 
 
Corporate bonds
4,138

 
—

 
(12
)
 
4,126

Certificates of deposit
7,511

 
2

 
(6
)
 
7,507

Government municipal bonds
1,996

 
—

 
(3
)
 
1,993

Non-current marketable securities
13,645

 
2

 
(21
)
 
13,626

Total marketable securities
$
60,869

 
$
10

 
$
(62
)
 
$
60,817

(1)
Included in amortized cost and fair value is purchased and accrued interest of $252.
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):
 
June 30, 2016
 
Less than 12 Months
 
More than 12 Months
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
Corporate bonds
$
32,214

 
$
(43
)
 
$
—

 
$
—

Commercial paper
23,954

 
(12
)
 
—

 
—

Government municipal bonds
1,876

 
(2
)
 
—

 
—

Total
$
58,044

 
$
(57
)
 
$
—

 
$
—

 
September 30, 2015
 
Less than 12 Months
 
More than 12 Months
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
Corporate bonds
$
33,664

 
$
(52
)
 
$
—

 
$
—

Commercial paper
5,987

 
(1
)
 
—

 
—

Certificates of deposit
4,244

 
(6
)
 
499

 
(1
)
Government municipal bonds
3,159

 
(3
)
 
—

 
—

Total
$
47,054

 
$
(62
)
 
$
499

 
$
(1
)