Fair Value Measurements - Reconciliation of Assets and Liabilities Measured Using Significant Unobservable Inputs (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2015 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total, period start	$ 6,207
Change in fair value, total	173
Total, period end	6,380
Convertible Debt Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at September 30, 2014	5,337
Change in fair value	259
Balance at June 30, 2015	5,596
Stock Warrants
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at September 30, 2014	59
Change in fair value	(8)
Balance at June 30, 2015	51
Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at September 30, 2015	811
Change in fair value	(78)
Balance at December 31, 2015	$ 733