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Fair Value Measurement (Tables)
 3 Months Ended
Dec. 31, 2017
Fair Value Disclosures [Abstract]  
Changes in financial assets fair value
The changes in financial assets measured at fair value for which the Company has used Level 3 inputs to determine fair value for the quarter ended December 31, 2017 are as follows ($ in thousands):
 
Level 3 Assets
 
 
Balance at September 30, 2017
$
491

Acquisition of financial assets
—

Settlements
(375
)
Change in fair value of financial assets
(110
)
Balance at December 31, 2017
$
6