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Fair Value Measurements (Tables)
6 Months Ended
Mar. 31, 2017
Fair Value Disclosures [Abstract]  
Fair Value of Assets Measured on Recurring Basis
The following tables provide information by level for financial assets and liabilities that are measured at fair value on a recurring basis (in thousands):
 
Total Fair
Value at
 
Fair Value Measurements Using
 Inputs Considered as
 
March 31, 2017
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market
$
37,125

 
$
37,125

 
$

 
$

Corporate bonds
25,331

 

 
25,331

 

Commercial paper
5,986

 

 
5,986

 

Certificates of deposit
7,026

 

 
7,026

 

Total assets measured at fair value
$
75,468

 
$
37,125

 
$
38,343

 
$

Liabilities:
 
 
 
 
 
 
 
Contingent consideration on acquired businesses
10,068

 
$

 
$

 
$
10,068

Total liabilities measured at fair value
$
10,068

 
$

 
$

 
$
10,068


 
Total Fair
Value at
 
Fair Value Measurements Using
 Inputs Considered as
 
September 30, 2016
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
Money market
$
44,319

 
$
44,319

 
$

 
$

Corporate bonds
28,767

 

 
28,767

 

Commercial paper
23,943

 

 
23,943

 

Certificates of deposit
7,309

 

 
7,309

 

Government municipal bonds
1,904

 

 
1,904

 

Total assets measured at fair value
$
106,242

 
$
44,319

 
$
61,923

 
$

Liabilities:
 
 
 
 
 
 
 
Contingent consideration on acquired businesses
$
9,960

 
$

 
$

 
$
9,960

Total liabilities measured at fair value
$
9,960

 
$

 
$

 
$
9,960

Fair Value of Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
The following table presents a reconciliation of the contingent consideration liability measured at fair value on a recurring basis using significant unobservable inputs (Level 3) (in thousands):
 
Three months ended March 31,
 
Six months ended March 31,
 
2017
 
2016
 
2017
 
2016
Fair value at beginning of period
$
10,660

 
$
10,400

 
$
9,960

 
$

Purchase price contingent consideration
10

 

 
1,310

 
10,400

Contingent consideration payments

 

 
(518
)
 

Change in fair value of contingent consideration
(602
)
 
122

 
(684
)
 
122

Fair value at end of period
$
10,068

 
$
10,522

 
$
10,068

 
$
10,522